context stringlengths 545 71.9k | questionsrc stringlengths 16 10.2k | question stringlengths 11 563 |
|---|---|---|
here is a simulation created by khan academy user justin helps that once again tries to give us an understanding of why we divide by n minus 1 to get an unbiased estimate of population variance when we 're trying to calculate the sample variance . so what he does here , the simulation , it has a population that has a u... | sample mean here only a little bit more than the true mean . in the vertical axis , using this denominator , dividing by n , we calculate two different variances . one variance , we use the sample mean . | how did we discover that using n-1 was a better estimation than using dividing by n ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | but they do n't look quite the same . are they mirror images ? well , no . | when we are talking about 'mirror images behind the molecule ' , how do the groups change place ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | you might say , wait , this hydrogen is on the right , this one 's on the left . it does n't matter . this is actually saying that the hydrogen 's pointing out front , the fluorine is pointing out back , hydrogen up front , fluorine back , chlorine out front , hydrogen back , chlorine out front , hydrogen back . | i do n't understand the last example why is it no longer superimposible if you change the `` br '' to a `` f '' and do you have to use the same rotation axis ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | then all of a sudden , you do not have this symmetry . these are mirror images , but they would not be superimposable . so if that was a fluorine , these would actually be enantiomers . | if we had not known it was already an enantiomer , how would we know where to place the mirror ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | it is superimposable on its mirror image . so even though it has chiral carbons in it , it is not a chiral molecule . and we call these meso compounds . | would n't any even number of chiral carbons = achiral molecule ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . | do tautomerism only consist of keto-enol conversion ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | even though we have two chiral centers , this is not a chiral molecule . it is the same thing as its mirror image . it is superimposable on its mirror image . it is superimposable on its mirror image . | what 's the difference between flipping over and reflecting over a mirror image ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so even though it has chiral carbons in it , it is not a chiral molecule . and we call these meso compounds . and we can point to one of them because they really are the same compound . | what is the difference between meso compounds and identical compounds ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is a class of stereoisomers , and we 've brought up this word before . we call this enantiomers . so if each of these are an enantiomers , i 'll say they are enantiomers of each other . | i do n't understand how second example is enantiomers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | these are the same molecules . so it is the same molecule . so this is interesting , and we saw this when we first learned about chirality . | why the second molecule is not a diastereomer ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | but if you think about it , they are mirror images of each other , and they each have two chiral centers or two chiral carbons . but if you think about it , all you have to do is flip this guy over and you will get this molecule . these are the same molecules . so it is the same molecule . | in the second example at time 7 , how come the fluorine and hydrogen flip and switch which way they are coming out of the paper , but when you flip the cyclohexane the bromines do not switch which way they are coming out of the plane ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so even though it has chiral carbons in it , it is not a chiral molecule . and we call these meso compounds . and we can point to one of them because they really are the same compound . | so are meso compounds stereoisomers or not ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | this is a meso compound . it has chiral centers . it has chiral carbons , i guess you could say it . but it is not a chiral compound . and the way to spot these fairly straightforward is that you have chiral centers , but there is a line of symmetry here . | there is said that the molecules are not chiral compounds , but why are those 2 compounds not chiral compounds ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | i guess the best way to visualize it , imagine putting a mirror behind this molecule . if you put a mirror behind this molecule , what would its reflection look like ? so if you put a mirror behind it , in the image of the mirror , this hydrogen would now , since the mirror 's behind this whole molecule , this hydrogen... | why you put the mirror behind in third example ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | how can we name a cyclical compound in r , s method ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so carbon to a fluorine , carbon to a fluorine , carbon to a bromine , carbon to a bromine , carbon to hydrogen in both of then carbon to the methyl group in both . but they do n't look quite the same . are they mirror images ? well , no . | do n't wedges become dashes and vice versa when you simply flip over the mirror ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | you might say , wait , this hydrogen is on the right , this one 's on the left . it does n't matter . this is actually saying that the hydrogen 's pointing out front , the fluorine is pointing out back , hydrogen up front , fluorine back , chlorine out front , hydrogen back , chlorine out front , hydrogen back . | the example shown in is the same molecule is n't it ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | these are the same molecules . so it is the same molecule . so this is interesting , and we saw this when we first learned about chirality . | what kind of molecule `` flipping '' is legall for molecule to stay the same ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | is the second example that sal gave a meso compound ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is interesting , and we saw this when we first learned about chirality . even though we have two chiral centers , this is not a chiral molecule . it is the same thing as its mirror image . | so , in the end , you can define a molecule as chiral only compared with another molecule ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | same thing over there . you have a hydrogen , bromine , hydrogen and a bromine , hydrogen , chlorine , hydrogen , chlorine , hydrogen , chlorine , hydrogen , chlorine . so it 's made up of the same things . | should n't the bromine be behind the plane and the hydrogen above the plane ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is interesting , and we saw this when we first learned about chirality . even though we have two chiral centers , this is not a chiral molecule . it is the same thing as its mirror image . | what is the difference between a diastereomer and a chiral molecule ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | for the last compound that is labeled as the same molecule and a meso compound , as it is flipped , does n't the stereochemistry of the substituents switch ( from pointing away from you to pointing towards you , etc ) ... so they are in fact enantiomers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so when you have a stereoisomer that is not a mirror , when you have two stereoisomers that are n't mirror images of each other , we call them diastereomers . i always have trouble saying that . let me write it . | is saying a molecule is meso the same as saying the molecule is optically inactive ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | we 're made up of the same things , but the bonds , what is connected to what is different . so we call this a constitutional isomer . so we are essentially made up of the same things , but we are actually two different molecule , actually , two very different molecules here . | is an enantiomer also sometimes referred to as an optical isomer ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | these are diastereomers , which is essentially saying it 's a stereoisomer that is not an enantiomer . that 's all it means : a stereoisomer , not an enantiomer . a stereoisomer 's either going to be an enantiomer or a diastereomer . now , let 's do this last one . | so , to be clear , a mesocompound is a stereoisomer that is an enantiomer and has a plane of symmetry ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | it is the same thing as its mirror image . it is superimposable on its mirror image . it is superimposable on its mirror image . | when we say superimposable on mirror image , that means you take the mirror image and directly put it on the original molecule with no rotation or anything ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | well , if i take this fluorine and i rotate it to where the hydrogen is , and i take the hydrogen and rotate it to where -- that 's all going to happen at once -- to where the bromine is , and i take the bromine and rotate it to where the fluorine is , i get that . so i can flip it and then i can rotate it around this ... | or does the rule go that you must flip the molecule in order to rotate ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | are they mirror images ? well , no . this guy 's mirror image would have the fluorine popping out here , the hydrogen going back here , and then would have the bromine pointing out here . | is the molecule in a stereoisomer as well ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | how exactly does having a fluorine instead of a bromine change the last compound from a meso compound to an enantiomer ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | they 're made up of the same thing , so these are going to be isomers . they 're going to be isomers , and they 're a special type of isomers . in this situation , we do n't have the same bonds . | hey , what kind of isomers are glucose and fructose ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so if that was a fluorine , these would actually be enantiomers . and this would not be only one meso compound , it would be two different enantiomers , and one of them would have an r direction and one of them would have an s direction if we go with the naming conventions that we learned . | does geometric refer to e/z and optic refering to r/s ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is interesting , and we saw this when we first learned about chirality . even though we have two chiral centers , this is not a chiral molecule . it is the same thing as its mirror image . | i still see two chiral carbon atoms with opposite chiralities in each of the two enantiomers , so should n't the two cancel out and leave an achiral molecule ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | what would be the difference between meso compound and a chiral molecule ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | then all of a sudden , you do not have this symmetry . these are mirror images , but they would not be superimposable . so if that was a fluorine , these would actually be enantiomers . and this would not be only one meso compound , it would be two different enantiomers , and one of them would have an r direction and o... | we are talking about stereoisomers , just wondering if we had to name this compound ( i think its 2-chloro-3-fluro-pentance ) with the r s configurations how would we write it ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | is the second compound pair meso compounds ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | these are diastereomers , which is essentially saying it 's a stereoisomer that is not an enantiomer . that 's all it means : a stereoisomer , not an enantiomer . a stereoisomer 's either going to be an enantiomer or a diastereomer . now , let 's do this last one . | is the second example an enantiomer ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so even though it has chiral carbons in it , it is not a chiral molecule . and we call these meso compounds . and we can point to one of them because they really are the same compound . | do meso compounds require the molecule to be symmetrical in some way ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is interesting , and we saw this when we first learned about chirality . even though we have two chiral centers , this is not a chiral molecule . it is the same thing as its mirror image . | so are meso compounds always the same molecule just with two or more chiral centers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | we 're made up of the same things , but the bonds , what is connected to what is different . so we call this a constitutional isomer . so we are essentially made up of the same things , but we are actually two different molecule , actually , two very different molecules here . | what 's the difference between a stereoisomer and a constitutional isomer ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is a class of stereoisomers , and we 've brought up this word before . we call this enantiomers . so if each of these are an enantiomers , i 'll say they are enantiomers of each other . | the example starting at 1.30 , are these not enantiomers as opposed to the same molecule ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | these are the same molecules . so it is the same molecule . so this is interesting , and we saw this when we first learned about chirality . | in the last example , how many enantiomeric forms of the molecule there are ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so if i did that , what would it look like ? i would have the carbon , this carbon here . i would have the methyl group on that side now . | or is the third example the same molecule if you rotate the bond between the f and h on the carbon atom and the cl and h on the 2nd carbon atom ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | they 're made up of the same thing , so these are going to be isomers . they 're going to be isomers , and they 're a special type of isomers . in this situation , we do n't have the same bonds . | which type of isomers are cis - trans in ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so it 's made up of the same things . they 're connected in the same way , so they 're definitely stereoisomers . well , we have to make sure they 're not -- well , let 's make sure they 're not the same molecule first . | is there any video explaining the types of stereoisomers - optical , geometrical & conformational isomerism ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and the way to spot these fairly straightforward is that you have chiral centers , but there is a line of symmetry here . there 's a line of symmetry right here . these two sides of the compound are mirror images of each other . | can an enantiomer or diastereomer have a line of symmetry ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | so in other words can an enantiomer have a line of symmetry or is that what separates an enantiomer from a meso compound ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is a class of stereoisomers , and we 've brought up this word before . we call this enantiomers . so if each of these are an enantiomers , i 'll say they are enantiomers of each other . | would the enantiomers presented in this video be configuration enantiomers or conformational enantiomers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and it would n't be completely off , but we look a little bit closer , you see that this guy on the left has one , two , three , four carbons , and so does this guy on the right . it has one , two , three , four carbons . this guy on the left has two , four , six , seven , eight hydrogens . | does the rotation of three bonds along the an axis around the chiral centre happen in one step , or do they have to be rotated each separately ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | even though we have two chiral centers , this is not a chiral molecule . it is the same thing as its mirror image . it is superimposable on its mirror image . it is superimposable on its mirror image . so even though it has chiral carbons in it , it is not a chiral molecule . | how does the last molecule become enantiomer of its mirror image when we replace br by f ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so even though it has chiral carbons in it , it is not a chiral molecule . and we call these meso compounds . and we can point to one of them because they really are the same compound . | why is it important to recognize meso compounds if really they are just the same molecule ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | how come the last example is classified as a meso compound , but the second example , which is also said to be the same molecule , is not ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so even though it has chiral carbons in it , it is not a chiral molecule . and we call these meso compounds . and we can point to one of them because they really are the same compound . | do stereoisomers , enantiomers , diastereomers , constitutional isomers and meso compounds imply a relationship between 2 molecules ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | it has chiral carbons , i guess you could say it . but it is not a chiral compound . and the way to spot these fairly straightforward is that you have chiral centers , but there is a line of symmetry here . | how to calculate the possible number of diastereomers for a chiral compound ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is interesting , and we saw this when we first learned about chirality . even though we have two chiral centers , this is not a chiral molecule . it is the same thing as its mirror image . | how to calculate the number of stereomers in cyclic and acyclic chiral compounds ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is interesting , and we saw this when we first learned about chirality . even though we have two chiral centers , this is not a chiral molecule . it is the same thing as its mirror image . | does the molecules have to be chiral to be stereoisomers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | why is example # 2 the same compound and example # 3 an enantiomer when they both have different bonds to the atoms ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | you have the carbons on both of them . this carbon looks like a chiral center . it 's bonded to one , two , three different groups . | to determine whether two structures are diasteriomers or the same in a compound with 2 or more stereo-center should i rotate one of those chiral carbon or deal as it is ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | but if you think about it , all you have to do is flip this guy over and you will get this molecule . these are the same molecules . so it is the same molecule . | could anyone explain how the last example depicts the 'same ' molecules ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is a class of stereoisomers , and we 've brought up this word before . we call this enantiomers . so if each of these are an enantiomers , i 'll say they are enantiomers of each other . | should n't these two 1-bromo-1-fluoroethanes be enantiomers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | these are the same molecules . so it is the same molecule . so this is interesting , and we saw this when we first learned about chirality . | why is the 3rd molecule ( introduced 0 ) an enantiomer and not a diastereoisomer ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | it 's bonded to a hydrogen and a chlorine , so it 's made up of the same constituents and they 're bonded in the same way . so these look like -- but the bonding is a little bit different . over here on this one on the left , the hydrogen goes in the back , and over here , the hydrogen 's in the front . | how do i know the spatial position for every atom in a specific bonding ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | i guess the best way to visualize it , imagine putting a mirror behind this molecule . if you put a mirror behind this molecule , what would its reflection look like ? so if you put a mirror behind it , in the image of the mirror , this hydrogen would now , since the mirror 's behind this whole molecule , this hydrogen... | does 'not superimposable ' just mean that , if we would put the actual molecule and the mirror image of a molecule on top of each other and the atoms would n't be the same , for example left and right of the molecule ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so even though it has chiral carbons in it , it is not a chiral molecule . and we call these meso compounds . and we can point to one of them because they really are the same compound . | so does that mean all achiral molecules are meso compounds ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | they 're made up of the same thing , so these are going to be isomers . they 're going to be isomers , and they 're a special type of isomers . in this situation , we do n't have the same bonds . | stereo-isomers of 2-isopropyl-5-methyl cyclohexanol is 8 how ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | they 're made up of the same thing , so these are going to be isomers . they 're going to be isomers , and they 're a special type of isomers . in this situation , we do n't have the same bonds . | what is the difference between optical isomers and optically active isomers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | how to know that a compound shows both geometrical and optical isomerism ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | how to know that a compound will form an enantiomeric pair ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | they 're made up of the same thing , so these are going to be isomers . they 're going to be isomers , and they 're a special type of isomers . in this situation , we do n't have the same bonds . | is it so that geometric isomers always means cis-trans ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | they 're made up of the same thing , so these are going to be isomers . they 're going to be isomers , and they 're a special type of isomers . in this situation , we do n't have the same bonds . | what is the difference between optical isomers and optically active isomers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | what does the addition of the letter et means when added after a compound ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | they 're made up of the same thing , so these are going to be isomers . they 're going to be isomers , and they 're a special type of isomers . in this situation , we do n't have the same bonds . | can you clarify exactly on the difference between a stereoisomers and constitutional isomers please ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is interesting , and we saw this when we first learned about chirality . even though we have two chiral centers , this is not a chiral molecule . it is the same thing as its mirror image . | for the last molecule , is n't a feature of the same molecule that it has the same r and s values at the same chiral centers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so if i did that , what would it look like ? i would have the carbon , this carbon here . i would have the methyl group on that side now . | why does the top br carbon on each side have opposite r , s values ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | these are the same molecules . so it is the same molecule . so this is interesting , and we saw this when we first learned about chirality . | at 13.10 sal replaces the bromine with the fluorine molecule , from the plane of symmetry i can easily say that they are enantiomeric compound , but i could n't understand how they differ in terms of mirror image with the original molecule , is n't it super imposable too as of the orignal molecule ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | we 're made up of the same things , but the bonds , what is connected to what is different . so we call this a constitutional isomer . so we are essentially made up of the same things , but we are actually two different molecule , actually , two very different molecules here . | 9 , would the constitutional isomer also be called a structural isomer ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | i would have the methyl group on that side now . and then since i flipped it over , the bromine was in the plane of the page . it 'll still be in the plane of the page , but since i flipped it over , the hydrogen , which was in the back , will now be in the front . | when you mention 'in the same plane as the page ' in reference to the bromine atom in the second pair of molecules , does that mean the bromine atom faces towards you ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so let me -- a good thing to do would be to just flip to see the fastest way i could potentially get there . let me just flip it like this . so i 'm going to flip out of the page , you can imagine . i 'm going to flip it like this . so i 'm going to take this methyl group and then put it on the right-hand side . | because if you flip the molecule on the left over to the right/flip 180 degrees , would n't the br groups be going away from you and the two hydrogens coming toward you ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | we could put a mirror right there , and they definitely look like mirror images . and this is a chiral carbon here . it 's bonded to one carbon group that is different than this carbon group . this carbon group has a bromine . this carbon group does n't . it just has a bunch of hydrogens on it , if you kind of go in th... | for the 1,2-dibromocyclohexane , if we were doing s and r , can the carbon have the br in both of its groups going around ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | they 're made up of the same thing , so these are going to be isomers . they 're going to be isomers , and they 're a special type of isomers . in this situation , we do n't have the same bonds . | are structural isomers the same as constitutional isomers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | same thing over there . you have a hydrogen , bromine , hydrogen and a bromine , hydrogen , chlorine , hydrogen , chlorine , hydrogen , chlorine , hydrogen , chlorine . so it 's made up of the same things . | i 'm not really understanding in the third example at around 5 minutes why you ca n't just rotate the chlorine and hydrogen groups to make it the same molecule as you did in the example just previous with rotating those hydrogen , fluorine and bromine groups ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | it is the same thing as its mirror image . it is superimposable on its mirror image . it is superimposable on its mirror image . | what is the difference between superimposable and superposable ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | you might say , wait , this hydrogen is on the right , this one 's on the left . it does n't matter . this is actually saying that the hydrogen 's pointing out front , the fluorine is pointing out back , hydrogen up front , fluorine back , chlorine out front , hydrogen back , chlorine out front , hydrogen back . | why are n't the compounds superimposible ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is interesting , and we saw this when we first learned about chirality . even though we have two chiral centers , this is not a chiral molecule . it is the same thing as its mirror image . | what is the difference between a stereocenter and a chiral centre ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and so this mirror image that i just thought about in white is exactly what this molecule is : hydrogen pointing out in front , hydrogen pointing out in front . you might say , wait , this hydrogen is on the right , this one 's on the left . it does n't matter . | i think sal meant to say `` superposable '' instead of `` superimposable , '' right ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | we 're made up of the same things , but the bonds , what is connected to what is different . so we call this a constitutional isomer . so we are essentially made up of the same things , but we are actually two different molecule , actually , two very different molecules here . now let 's look at this next guy over here... | is there any different between between structural and costituitional isomer ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this is a class of stereoisomers , and we 've brought up this word before . we call this enantiomers . so if each of these are an enantiomers , i 'll say they are enantiomers of each other . they 're steroisomers . | so all enantiomers are stereoisomers , but not all stereoisomers are enantiomers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so if that was a fluorine , these would actually be enantiomers . and this would not be only one meso compound , it would be two different enantiomers , and one of them would have an r direction and one of them would have an s direction if we go with the naming conventions that we learned . | cant we just invert the plane on which the compounds are observed ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | it is an asymmetric carbon . it is bonded to four different groups : fluorine , bromine , hydrogen , and then a methyl group . and so 's this one . | readjust and you can now impose fluorine over fluorine and bromine over bromine ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | and we can point to one of them because they really are the same compound . this is a meso compound . it has chiral centers . | what 's the point of knowing if a molecule is a meso compound ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | we 're made up of the same things , but the bonds , what is connected to what is different . so we call this a constitutional isomer . so we are essentially made up of the same things , but we are actually two different molecule , actually , two very different molecules here . | what is the difference between a constitutional isomer and a configurational isomer ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . | do professional chemists have to remember these terminology ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | but they do n't look quite the same . are they mirror images ? well , no . | so just to clarify ... enantiomers are stereoisomers with non-superimposable mirror images diastereomers are stereoisomers that are not mirror images meso compounds are achiral molecules with superimposable mirror images is this correct ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so this part , you could think of it this way . this is the mirror image of this , this is the mirror image of this part , but this is not the mirror image of that part . so when you have a stereoisomer that is not a mirror , when you have two stereoisomers that are n't mirror images of each other , we call them diaste... | i understand the mirror is behind the molecule , but what is sal 's pov when he is drawing the 'mirror image ' ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | you might say , wait , this hydrogen is on the right , this one 's on the left . it does n't matter . this is actually saying that the hydrogen 's pointing out front , the fluorine is pointing out back , hydrogen up front , fluorine back , chlorine out front , hydrogen back , chlorine out front , hydrogen back . | i do n't understand how you could swap the br and h ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | they 're made up of the same thing , so these are going to be isomers . they 're going to be isomers , and they 're a special type of isomers . in this situation , we do n't have the same bonds . | can you tell me about monosubstituted / disubstituted /trisubsituted isomers ( particularly benzene ) please ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | they 're made up of the same thing , so these are going to be isomers . they 're going to be isomers , and they 're a special type of isomers . in this situation , we do n't have the same bonds . | how do i figure out the number of substituted isomers ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so even though it has chiral carbons in it , it is not a chiral molecule . and we call these meso compounds . and we can point to one of them because they really are the same compound . | would n't meso compounds just be called identical than ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | we 're made up of the same things , but the bonds , what is connected to what is different . so we call this a constitutional isomer . so we are essentially made up of the same things , but we are actually two different molecule , actually , two very different molecules here . | i do n't understand how to tell if something is a geometric isomer , i understand how to tell if something is cis/trans , but how can you tell if it 's a geometric isomer ? |
in this video , we 're going to look at pairs of molecules and see if they relate to each other in any obvious way or maybe less than obvious way . so these first two right here , they actually look like a completely different molecules . so your gut impulse might be to say that these are completely different molecules... | so even though it has chiral carbons in it , it is not a chiral molecule . and we call these meso compounds . and we can point to one of them because they really are the same compound . | at 13.13 , when you switch from bromine to fluorine , how is that now an enantiomer , both compounds are still oriented the same way in space in all chirality centers , i understand how its no longer meso , but how is it enantiomer when u have wedges and dashes in the same spot on both compounds ? |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.