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Triafulvalene or cyclopropenylidenecyclopropene is a fulvalene hydrocarbon with chemical formula C 6 H 4 , composed of two linked cyclopropene rings. Triafulvalene has never been isolated, [ 1 ] since it can decompose via an isodesmic reaction . [ 2 ] However, its structure, [ 3 ] stability, and spectral properties are... | https://en.wikipedia.org/wiki/Triafulvalene |
The triakis truncated tetrahedral honeycomb is a space-filling tessellation (or honeycomb ) in Euclidean 3-space made up of triakis truncated tetrahedra . It was discovered in 1914. [ 1 ] [ 2 ]
It is the Voronoi tessellation of the carbon atoms in diamond , [ 3 ] [ 4 ] which lie in the diamond cubic crystal structure.... | https://en.wikipedia.org/wiki/Triakis_truncated_tetrahedral_honeycomb |
Trial and error is a fundamental method of problem-solving [ 1 ] characterized by repeated, varied attempts which are continued until success, [ 2 ] or until the practicer stops trying.
According to W.H. Thorpe , the term was devised by C. Lloyd Morgan (1852–1936) after trying out similar phrases "trial and failure" a... | https://en.wikipedia.org/wiki/Trial_and_error |
In mathematics , a triangle group is a group that can be realized geometrically by sequences of reflections across the sides of a triangle . The triangle can be an ordinary Euclidean triangle, a triangle on the sphere , or a hyperbolic triangle . Each triangle group is the symmetry group of a tiling of the Euclidean p... | https://en.wikipedia.org/wiki/Triangle_group |
In mathematics , the triangle inequality states that for any triangle , the sum of the lengths of any two sides must be greater than or equal to the length of the remaining side. [ 1 ] [ 2 ] This statement permits the inclusion of degenerate triangles , but some authors, especially those writing about elementary geomet... | https://en.wikipedia.org/wiki/Triangle_inequality |
The triangle of U ( / uː / OO ) is a theory about the evolution and relationships among the six most commonly known members of the plant genus Brassica . The theory states that the genomes of three ancestral diploid species of Brassica combined to create three common tetraploid vegetables and oilseed crop species. [ 1 ... | https://en.wikipedia.org/wiki/Triangle_of_U |
The triangle of auscultation is a relative thinning of the musculature of the back , situated along the medial border of the scapula which allows for improved listening to the lungs .
It has the following boundaries:
The superficial floor of the triangle is formed by the lateral portion of the erector spinae muscles.... | https://en.wikipedia.org/wiki/Triangle_of_auscultation |
In the system of Aristotelian logic , the triangle of opposition is a diagram [ which? ] representing the different ways in which each of the three propositions of the system is logically related ('opposed') to each of the others. The system is also useful in the analysis of syllogistic logic, serving to identify the a... | https://en.wikipedia.org/wiki/Triangle_of_opposition |
The term triangular coordinates may refer to any of at least three related systems of coordinates in the Euclidean plane : | https://en.wikipedia.org/wiki/Triangular_coordinates |
In computer algebra , a triangular decomposition of a polynomial system S is a set of simpler polynomial systems S 1 , ..., S e such that a point is a solution of S if and only if it is a solution of one of the systems S 1 , ..., S e .
When the purpose is to describe the solution set of S in the algebraic closure of i... | https://en.wikipedia.org/wiki/Triangular_decomposition |
The triangular fibrocartilage complex (TFCC) is formed by the triangular fibrocartilage discus (TFC), the radioulnar ligaments (RULs) and the ulnocarpal ligaments (UCLs).
The triangular fibrocartilage disc (TFC) is an articular discus that lies on the pole of the distal ulna . It has a triangular shape and a biconcave... | https://en.wikipedia.org/wiki/Triangular_fibrocartilage |
The triangular interval (also known as the lateral triangular space , [ 1 ] lower triangular space , [ 2 ] and triceps hiatus ) is a space found in the axilla . It is one of the three intermuscular spaces found in the axillary space . The other two spaces are: quadrangular space and triangular space . [ 3 ]
Two of its... | https://en.wikipedia.org/wiki/Triangular_interval |
In coding theory , triangular network coding ( TNC ) is a non-linear network coding based packet coding scheme introduced by Qureshi, Foh & Cai (2012) . [ 1 ] Previously, packet coding for network coding was done using linear network coding (LNC). The drawback of LNC over large finite field is that it resulted in high ... | https://en.wikipedia.org/wiki/Triangular_network_coding |
A triangular number or triangle number counts objects arranged in an equilateral triangle . Triangular numbers are a type of figurate number , other examples being square numbers and cube numbers . The n th triangular number is the number of dots in the triangular arrangement with n dots on each side, and is equal to t... | https://en.wikipedia.org/wiki/Triangular_number |
In trigonometry and geometry , triangulation is the process of determining the location of a point by forming triangles to the point from known points.
Specifically in surveying , triangulation involves only angle measurements at known points, rather than measuring distances to the point directly as in trilateration ;... | https://en.wikipedia.org/wiki/Triangulation |
In surveying , triangulation is the process of determining the location of a point by measuring only angles to it from known points at either end of a fixed baseline by using trigonometry , rather than measuring distances to the point directly as in trilateration . The point can then be fixed as the third point of a tr... | https://en.wikipedia.org/wiki/Triangulation_(surveying) |
In mathematics, triangulation describes the replacement of topological spaces with simplicial complexes by the choice of an appropriate homeomorphism . A space that admits such a homeomorphism is called a triangulable space . Triangulations can also be used to define a piecewise linear structure for a space, if one exi... | https://en.wikipedia.org/wiki/Triangulation_(topology) |
Triangulene (also known as Clar's hydrocarbon) is the smallest triplet-ground-state polybenzenoid . [ 1 ] It exists as a biradical with the chemical formula C 22 H 12 . [ 2 ] It was first hypothesized by Czech chemist Erich Clar in 1953. [ 3 ] Its first confirmed synthesis was published in a February 2017 issue of Natu... | https://en.wikipedia.org/wiki/Triangulene |
Triangulum Minus ( Latin for the Smaller Triangle ) was a constellation created by Johannes Hevelius . Its name is sometimes wrongly written as Triangulum Min or . It was formed from the southern parts of his Triangula (plural form of Triangulum ), alongside Triangulum Majus , but is no longer in use. The triangle was ... | https://en.wikipedia.org/wiki/Triangulum_Minus |
Triatomic hydrogen or H 3 is an unstable triatomic molecule containing only hydrogen . Since this molecule contains only three atoms of hydrogen it is the simplest triatomic molecule [ 1 ] and it is relatively simple to numerically solve the quantum mechanics description of the particles. Being unstable the molecule br... | https://en.wikipedia.org/wiki/Triatomic_hydrogen |
Triatomic molecules are molecules composed of three atoms , of either the same or different chemical elements . Examples include H 2 O , CO 2 (pictured), HCN , O 3 ( ozone ) and NO 2 .
The vibrational modes of a triatomic molecule can be determined in specific cases.
A symmetric linear molecule ABA can perform:
In t... | https://en.wikipedia.org/wiki/Triatomic_molecule |
In materials science , a triaxial shear test is a common method to measure the mechanical properties of many deformable solids, especially soil (e.g., sand , clay ) and rock , and other granular materials or powders . There are several variations on the test. [ 1 ] [ 2 ] [ 3 ] [ 4 ] In a triaxial shear test, stress is ... | https://en.wikipedia.org/wiki/Triaxial_shear_test |
Triazabicyclodecene ( 1,5,7-triazabicyclo[4.4.0]dec-5-ene or TBD ) is an organic compound consisting of a bicyclic guanidine . For a charge-neutral compound, it is a relatively strong base that is effective for a variety of organic transformations. TBD is colorless solid that is soluble in a variety of solvents. [ 4 ]... | https://en.wikipedia.org/wiki/Triazabicyclodecene |
Triazenes are organic compounds that contain the functional group R 1 −N=N−NR 2 R 3 , where the R are each any of various types of substituent groups. [ 2 ] Some medications and dyes are triazenes. [ 3 ] Formally, the triazenes are related to the unstable chemical triazene , H 2 N−N=NH.
Triazenes are prepared from th... | https://en.wikipedia.org/wiki/Triazenes |
Tribasic may refer to: | https://en.wikipedia.org/wiki/Tribasic |
Tribimaximal mixing [ 1 ] is a specific postulated form for the Pontecorvo–Maki–Nakagawa–Sakata (PMNS) lepton mixing matrix U . Tribimaximal mixing is defined by a particular choice of the matrix of moduli-squared of the elements of the PMNS matrix as follows:
This mixing is historically interesting as it is quite clo... | https://en.wikipedia.org/wiki/Tribimaximal_mixing |
Tribochromism refers to a change in colour of a material caused by mechanical friction , similar to piezochromism , the change in colour of a material caused by pressure . It is a property of some materials and is often associated with thermochromism . [ 1 ] Tribochromism and piezochromism are often grouped together un... | https://en.wikipedia.org/wiki/Tribochromism |
Tribocorrosion is a material degradation process due to the combined effect of corrosion and wear . [ 1 ] The name tribocorrosion expresses the underlying disciplines of tribology and corrosion . Tribology is concerned with the study of friction, lubrication and wear (its name comes from the Greek "tribo" meaning to ru... | https://en.wikipedia.org/wiki/Tribocorrosion |
Tribofilms ( boundary lubricant films , [ 1 ] boundary lubricating films , [ 2 ] tribo-boundary films [ 3 ] or boundary films [ 4 ] ) are films that form on tribologically stressed surfaces. Tribofilms are mostly solid surface films that result from a chemical reaction of lubricant components or tribological surfaces.
... | https://en.wikipedia.org/wiki/Tribofilm |
Tribology is the science and engineering of understanding friction , lubrication and wear phenomena for interacting surfaces in relative motion . It is highly interdisciplinary, drawing on many academic fields, including physics , chemistry , materials science , mathematics , biology and engineering . [ 1 ] The fundame... | https://en.wikipedia.org/wiki/Tribology |
Triboluminescence is a phenomenon in which light is generated when a material is mechanically pulled apart, ripped, scratched, crushed, or rubbed (see tribology ). The phenomenon is not fully understood but appears in most cases to be caused by the separation and reunification of static electric charges , see also trib... | https://en.wikipedia.org/wiki/Triboluminescence |
A tribometer is an instrument that measures tribological quantities, such as coefficient of friction , friction force, and wear volume, between two surfaces in contact. It was invented by the 18th century Dutch scientist Musschenbroek [ 1 ] [ 2 ]
A tribotester is the general name given to a machine or device used to p... | https://en.wikipedia.org/wiki/Tribometer |
The triboracyclopropenyl fragment is a cyclic structural motif in boron chemistry, named for its geometric similarity to cyclopropene . In contrast to nonplanar borane clusters that exhibit higher coordination numbers at boron (e.g., through 3-center 2-electron bonds to bridging hydrides or cations ), triboracycloprope... | https://en.wikipedia.org/wiki/Triboracyclopropenyl |
A tribosystem is a tribological system that consists of at least two contacting bodies and any environmental factor that affects their interaction. [ 1 ] Tribologists study tribological systems in detail, and devise tribological test procedures.
According to ASTM G40-17 , a tribosystem is "any system that contains one... | https://en.wikipedia.org/wiki/Tribosystem |
Tribotronics is about the research on interaction between triboelectricity and semiconductor , which is using triboelectric potential controlling electrical transport and transformation in semiconductors for information sensing and active control (info-tribotronics), and using semiconductors managing triboelectric powe... | https://en.wikipedia.org/wiki/Tribotronics |
The tribovoltaic effect is a type of triboelectric current where a direct-current (DC) current is generated by sliding a P-type semiconductor on top of a N-type semiconductor or a metal surface without the illumination of photons, which was firstly proposed by Wang et al . [ 1 ] in 2019 and later observed experimentall... | https://en.wikipedia.org/wiki/Tribovoltaic_effect |
Tribromine octoxide is a binary inorganic compound of bromine and oxygen with the chemical formula Br 3 O 8 . [ 1 ] [ 2 ] This is a free radical and one of the most complex bromine oxides .
A reaction of Br 2 with O 3 at 273 K and low pressure. [ 3 ] [ 4 ] [ 5 ]
The compound forms a white solid. [ 6 ] It exists in tw... | https://en.wikipedia.org/wiki/Tribromine_octoxide |
Tribromoisocyanuric acid (C 3 Br 3 N 3 O 3 ) is a chemical compound used as a reagent for bromination in organic synthesis . [ 1 ] It is a white crystalline powder with a strong bromine odour. It is similar to trichloroisocyanuric acid .
Tribromoisocyanuric acid is used for the bromination of aromatics and alkenes. | https://en.wikipedia.org/wiki/Tribromoisocyanuric_acid |
Tributyltin ( TBT ) is an umbrella term for a class of organotin compounds which contain the (C 4 H 9 ) 3 Sn group , with a prominent example being tributyltin oxide . [ 1 ] For 40 years TBT was used as a biocide in anti-fouling paint , commonly known as bottom paint , applied to the hulls of oceangoing vessels. [ 2 ] ... | https://en.wikipedia.org/wiki/Tributyltin |
Tributyltin azide is an organotin compound with the formula (C 4 H 9 ) 3 SnN 3 . It is a colorless solid although samples can appear as yellow oils. The compound is used as a reagent in organic synthesis .
Tributyltin azide is synthesized by the salt metathesis reaction of tributyltin chloride and sodium azide .
It ... | https://en.wikipedia.org/wiki/Tributyltin_azide |
In chemistry , the tricapped trigonal prismatic molecular geometry describes the shape of compounds where nine atoms, groups of atoms, or ligands are arranged around a central atom, defining the vertices of a triaugmented triangular prism (a trigonal prism with an extra atom attached to each of its three rectangular fa... | https://en.wikipedia.org/wiki/Tricapped_trigonal_prismatic_molecular_geometry |
Tricarbon (systematically named 1λ 2 ,3λ 2 -propadiene and catena -tricarbon ) is an inorganic compound with the chemical formula C 2 (μ-C) (also written [C(μ-C)C] or C 3 ). It is a colourless gas that only persists in dilution or solution as an adduct . It is one of the simplest unsaturated carbenes . Tricarbon can be... | https://en.wikipedia.org/wiki/Tricarbon |
Trichloroacetonitrile is an organic compound with the formula CCl 3 CN. It is a colourless liquid, although commercial samples often are brownish. It is used commercially as a precursor to the fungicide etridiazole . It is prepared by dehydration of trichloroacetamide . [ 1 ] As a bifunctional compound , trichloroacet... | https://en.wikipedia.org/wiki/Trichloroacetonitrile |
Trichloroethylene ( TCE ) is a halocarbon with the formula C 2 HCl 3 , commonly used as an industrial metal-degreasing solvent . It is a clear, colourless, non-flammable, volatile liquid with a chloroform -like pleasant mild smell [ 3 ] and sweet taste. [ 9 ] Its IUPAC name is trichloroethene . Trichloroethylene has be... | https://en.wikipedia.org/wiki/Trichloroethylene |
This page provides supplementary chemical data on trichloroethylene .
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet ( MSDS ) for this chemical from a reliable source such as eChemPortal , and follow its directions.
Table data ob... | https://en.wikipedia.org/wiki/Trichloroethylene_(data_page) |
Trichlorofluoromethane, also called freon-11 , CFC-11 , or R-11 , is a chlorofluorocarbon (CFC). It is a colorless, faintly ethereal, and sweetish-smelling liquid that boils around room temperature. [ 5 ] CFC-11 is a Class 1 ozone -depleting substance which damages Earth's protective stratospheric ozone layer . [ 6 ]... | https://en.wikipedia.org/wiki/Trichlorofluoromethane |
This is a supplementary data page for trichlorofluoromethane . | https://en.wikipedia.org/wiki/Trichlorofluoromethane_(data_page) |
The trichloromethyl group is a functional group that has the formula −CCl 3 . The naming of is group is derived from the methyl group (which has the formula −CH 3 ), by replacing each hydrogen atom by a chlorine atom. Compounds with this group are a subclass of the organochlorines . Some notable examples of compounds w... | https://en.wikipedia.org/wiki/Trichloromethyl_group |
Trichoderma asperellum Samuels, Lieckf & Nirenberg [ 1 ] is a species of fungus in the family Hypocreaceae . [ 2 ] It can be distinguished from T. viride by molecular and phenotypic characteristics. The most important molecular characteristics are divergent ITS-1 and 28S sequences and RFLP's of the endochitinase gene. ... | https://en.wikipedia.org/wiki/Trichoderma_asperellum |
Phymatotrichum hamatum (Bonord.) Oudem. 1903 [ 1 ] Pachybasium hamatum (Bonord.) Sacc. 1885 [ 2 ] Verticillium hamatum Bonord. 1851 [ 3 ]
Trichoderma hamatum [ 4 ] is a species of fungus in the family Hypocreaceae . [ 5 ] It has been used a biological control of certain plant diseases, including Sclerotinia lettuce dr... | https://en.wikipedia.org/wiki/Trichoderma_hamatum |
Trichoderma stromaticum [ 1 ] is a species of fungus in the family Hypocreaceae . [ 2 ] It is a parasite of the cacao witches broom pathogen and has been used in its biological control . [ 3 ] | https://en.wikipedia.org/wiki/Trichoderma_stromaticum |
Trichophagia is a form of disordered eating in which persons with the disorder suck on, chew, swallow, or otherwise eat hair. [ 1 ] The term is derived from ancient Greek θρίξ, thrix ("hair") and φαγεῖν, phagein ("to eat"). [ 2 ] Tricho- phagy refers only to the chewing of hair, whereas tricho- phagia is ingestion of h... | https://en.wikipedia.org/wiki/Trichophagia |
Trichosclereids are hard needlelike branched cells found in some species of plants that serve the purpose of protecting the plant from herbivores . They are usually approximately 6 mm (1/4 inch) long, but in some species they grow to as long as 1 cm (0.4 inches). Trichosclereids are a type of sclereids that can be foun... | https://en.wikipedia.org/wiki/Trichosclereid |
In group theory , the trichotomy theorem divides the finite simple groups of characteristic 2 type and rank at least 3 into three classes. It was proved by Aschbacher ( 1981 , 1983 ) for rank 3 and by Gorenstein & Lyons (1983) for rank at least 4. The three classes are groups of GF(2) type (classified by Timmesfeld an... | https://en.wikipedia.org/wiki/Trichotomy_theorem |
A trickle-bed reactor ( TBR ) is a chemical reactor that uses the downward movement of a liquid and the downward (co-current) or upward (counter-current) movement of gas over a packed bed of ( catalyst ) particles. It is considered to be the simplest reactor type for performing catalytic reactions where a gas and liqui... | https://en.wikipedia.org/wiki/Trickle-bed_reactor |
A trickling filter is a type of wastewater treatment system. It consists of a fixed bed of some material, such as rocks , coke , gravel , slag , polyurethane foam , sphagnum peat moss , ceramic , or plastic media, over which sewage or other wastewater flows downward and causes a layer of microbial slime ( biofilm ) to ... | https://en.wikipedia.org/wiki/Trickling_filter |
Triclocarban (sometimes abbreviated as TCC ) is an antibacterial chemical once common in, but now phased out of, personal care products like soaps and lotions. It was originally developed for the medical field. [ 2 ] Although the mode of action is unknown, TCC can be effective in fighting infections by targeting the gr... | https://en.wikipedia.org/wiki/Triclocarban |
Triclosan (sometimes abbreviated as TCS ) is an antibacterial and antifungal agent present in some consumer products, including toothpaste , soaps , detergents , toys, and surgical cleaning treatments. It is similar in its uses and mechanism of action to triclocarban . Its efficacy as an antimicrobial agent , the risk ... | https://en.wikipedia.org/wiki/Triclosan |
Triconex is a Schneider Electric brand that supplies products, systems, and services for safety, critical control, and turbo-machinery applications. Triconex also use its name for its hardware devices that use its TriStation application software. Triconex products are based on patented Triple modular redundancy (TMR) i... | https://en.wikipedia.org/wiki/Triconex |
In systems engineering , the tricotyledon theory of system design ( T3SD ) is a mathematical theory of system design developed by A. Wayne Wymore . [ 1 ] T3SD consists of a language for describing systems and requirements , which is based on set theory , a mathematical systems model based on port automata, and a precis... | https://en.wikipedia.org/wiki/Tricotyledon_theory_of_system_design |
A tricritical point is a point where a second order phase transition curve meets a first order phase transition curve. The notion was first introduced by Lev Landau in 1937, who referred to the tricritical point as the critical point of the continuous transition. [ 1 ] [ 2 ] The first example of a tricritical point was... | https://en.wikipedia.org/wiki/Tricritical_point |
A tridentate ligand (or terdentate ligand ) is a ligand that has three atoms that can function as donor atoms in a coordination complex . [ 1 ]
Well-known tridentate ligands include diethylenetriamine with three nitrogen donor atoms, and the iminodiacetate anion which consists of one deprotonated amine nitrogen and a ... | https://en.wikipedia.org/wiki/Tridentate_ligand |
Triethyl orthoacetate is the organic compound with the formula CH 3 C(OC 2 H 5 ) 3 . It is the ethyl orthoester of acetic acid . It is a colorless oily liquid.
Triethyl orthoacetate is used in organic synthesis for acetylation . [ 1 ]
It is also used in the Johnson-Claisen rearrangement . [ 2 ] | https://en.wikipedia.org/wiki/Triethyl_orthoacetate |
Triethyl phosphonoacetate is a reagent for organic synthesis used in the Horner-Wadsworth-Emmons reaction (HWE) or the Horner-Emmons modification.
Triethyl phosphonoacetate can be added dropwise to sodium methoxide solution to prepare a phosphonate anion. It has an acidic proton that can easily be abstracted by a wea... | https://en.wikipedia.org/wiki/Triethyl_phosphonoacetate |
Triethylene glycol dinitrate ( TEGDN ) is an, ether , nitrated alcohol ester of triethylene glycol . It is used as an energetic plasticizer in explosives and propellants . It is a pale yellow oily liquid. [ 1 ] It is somewhat similar to nitroglycerin .
TEGDN is often used together with trimethylolethane trinitrate (TM... | https://en.wikipedia.org/wiki/Triethylene_glycol_dinitrate |
Triethylgallium is the organogallium compound with the formul Ga(C 2 H 5 ) 3 . Also called TEGa , it is a metalorganic source of gallium for metalorganic vapour phase epitaxy (MOVPE) of compound semiconductors . It is a colorless pyrophoric liquid, [ 2 ] typically handled with air-free techniques . It was discovered b... | https://en.wikipedia.org/wiki/Triethylgallium |
Triethyloxonium tetrafluoroborate is the organic oxonium compound with the formula [(CH 3 CH 2 ) 3 O] + [BF 4 ] − . It is often called Meerwein's reagent or Meerwein's salt after its discoverer Hans Meerwein . [ 2 ] [ 3 ] Also well known and commercially available is the related trimethyloxonium tetrafluoroborate . The... | https://en.wikipedia.org/wiki/Triethyloxonium_tetrafluoroborate |
Triethylsilane is the organosilicon compound with the formula (C 2 H 5 ) 3 SiH. It is a trialkylsilane. The Si-H bond is reactive.
It was first discovered by Albert Ladenburg in 1872 among the products of reduction of tetraethyl orthosilicate with sodium and diethylzinc . [ 2 ] He also prepared it by a stepwise reduct... | https://en.wikipedia.org/wiki/Triethylsilane |
Triflic acid , the short name for trifluoromethanesulfonic acid , TFMS , TFSA , HOTf or TfOH , is a sulfonic acid with the chemical formula CF 3 SO 3 H. It is one of the strongest known acids . Triflic acid is mainly used in research as a catalyst for esterification . [ 2 ] [ 3 ] It is a hygroscopic , colorless, sligh... | https://en.wikipedia.org/wiki/Triflic_acid |
Trifluoroacetic acid ( TFA ) is a synthetic organofluorine compound with the chemical formula CF 3 CO 2 H. It is a haloacetic acid , with all three of the acetyl group's hydrogen atoms replaced by fluorine atoms. It is a colorless liquid with a vinegar -like odor. TFA is a stronger acid than acetic acid , having an aci... | https://en.wikipedia.org/wiki/Trifluoroacetic_acid |
This page provides supplementary chemical data on trifluoroiodomethane .
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet ( MSDS ) for this chemical from a reliable source such as SIRI , and follow its directions. | https://en.wikipedia.org/wiki/Trifluoroiodomethane_(data_page) |
Trifluoromethanesulfonic anhydride , also known as triflic anhydride, is the chemical compound with the formula (CF 3 SO 2 ) 2 O. It is the acid anhydride derived from triflic acid . This compound is a strong electrophile , useful for introducing the triflyl group , CF 3 SO 2 . Abbreviated Tf 2 O , triflic anhydride is... | https://en.wikipedia.org/wiki/Trifluoromethanesulfonic_anhydride |
Trifluoromethanesulfonyl azide or triflyl azide CF 3 SO 2 N 3 is an organic azide used as a reagent in organic synthesis . [ 2 ]
Trifluoromethanesulfonyl azide is prepared by treating trifluoromethanesulfonic anhydride with sodium azide , traditionally in dichloromethane . [ 1 ] However, the use of dichloromethane is ... | https://en.wikipedia.org/wiki/Trifluoromethanesulfonyl_azide |
The trifluoromethyl group is a functional group that has the formula −CF 3 . The naming of is group is derived from the methyl group (which has the formula −CH 3 ), by replacing each hydrogen atom by a fluorine atom. Some common examples are trifluoromethane H−CF 3 , 1,1,1-trifluoroethane H 3 C−CF 3 , and hexafluoroace... | https://en.wikipedia.org/wiki/Trifluoromethyl_group |
Trifluoromethylation in organic chemistry describes any organic reaction that introduces a trifluoromethyl group in an organic compound. [ 1 ] [ 2 ] [ 3 ] [ 4 ] Trifluoromethylated compounds are of some importance in pharmaceutical industry and agrochemicals . Several notable pharmaceutical compounds have a trifluorome... | https://en.wikipedia.org/wiki/Trifluoromethylation |
Trifluoromethylsulfur pentafluoride , CF 3 SF 5 , is a rarely used industrial greenhouse gas . [ 1 ] It was first identified in the atmosphere in 2000. [ 2 ] Trifluoromethylsulfur pentafluoride is considered to be one of the several "super-greenhouse gases".
The chemistry of this compound is similar to that of sulfur ... | https://en.wikipedia.org/wiki/Trifluoromethylsulfur_pentafluoride |
Trifluoromethyltrimethylsilane (known as Ruppert-Prakash reagent , TMSCF 3 ) is an organosilicon compound with the formula CF 3 Si(CH 3 ) 3 . It is a colorless liquid. The compound is a reagent used in organic chemistry for the introduction of the trifluoromethyl group . The compound was first prepared in 1984 by Ingo... | https://en.wikipedia.org/wiki/Trifluoromethyltrimethylsilane |
The trifluorooxonium cation is a hypothetical positively charged polyatomic ion with chemical formula O F + 3 . It is structurally equivalent to the hydronium ion where the hydrogen atoms surrounding the central oxygen atom have been replaced by fluorine , and is isoelectronic with nitrogen trifluoride . This cation wo... | https://en.wikipedia.org/wiki/Trifluorooxonium |
Trifluralin is a common pre-emergent selective herbicide , a dinitroaniline . With about 14 million pounds (6,400 t) used in the United States in 2001, [ 3 ] and 3–7 million pounds (1,400–3,200 t) in 2012, [ 4 ] it is one of the most widely used herbicides. Trifluralin is also used in Australia, [ 5 ] New Zealand, [ 6... | https://en.wikipedia.org/wiki/Trifluralin |
In organic chemistry , the triflyl group ( systematic name : trifluoromethanesulfonyl group ) is a functional group with the formula R−SO 2 CF 3 and structure R−S(=O) 2 −CF 3 . The triflyl group is often represented by –Tf .
The related triflate group (trifluoromethanesulfonate) has the formula R−OSO 2 CF 3 , and is r... | https://en.wikipedia.org/wiki/Triflyl_group |
In computer vision , the trifocal tensor (also tritensor ) is a 3×3×3 array of numbers (i.e., a tensor ) that incorporates all projective geometric relationships among three views. It relates the coordinates of corresponding points or lines in three views, being independent of the scene structure and depending only on ... | https://en.wikipedia.org/wiki/Trifocal_tensor |
A trifunctional antibody is a monoclonal antibody with binding sites for two different antigens, typically CD3 and a tumor antigen , making it a type of bispecific monoclonal antibody . In addition, its intact Fc-part can bind to an Fc receptor on accessory cells like conventional monospecific antibodies. The net effec... | https://en.wikipedia.org/wiki/Trifunctional_antibody |
In neuroscience and neurology , a trigger zone is an area in the body, or of a cell, in which a specific type of stimulation triggers a specific type of response.
The term was first used in this context around 1914 by Hugh T. Patrick, who was writing about trigeminal neuralgia , a condition in which pain fibers in the... | https://en.wikipedia.org/wiki/Trigger_zone |
In chemistry , a trigonal bipyramid formation is a molecular geometry with one atom at the center and 5 more atoms at the corners of a triangular bipyramid . [ 1 ] This is one geometry for which the bond angles surrounding the central atom are not identical (see also pentagonal bipyramid ), because there is no geometri... | https://en.wikipedia.org/wiki/Trigonal_bipyramidal_molecular_geometry |
In chemistry , trigonal planar is a molecular geometry model with one atom at the center and three atoms at the corners of an equilateral triangle , called peripheral atoms, all in one plane. [ 1 ] In an ideal trigonal planar species, all three ligands are identical and all bond angles are 120°. Such species belong to ... | https://en.wikipedia.org/wiki/Trigonal_planar_molecular_geometry |
In chemistry , the trigonal prismatic molecular geometry describes the shape of compounds where six atoms, groups of atoms, or ligands are arranged around a central atom, defining the vertices of a triangular prism . The structure commonly occurs for d 0 , d 1 and d 2 transition metal complexes with covalently-bound li... | https://en.wikipedia.org/wiki/Trigonal_prismatic_molecular_geometry |
In chemistry , a trigonal pyramid is a molecular geometry with one atom at the apex and three atoms at the corners of a trigonal base, resembling a tetrahedron (not to be confused with the tetrahedral geometry ). When all three atoms at the corners are identical, the molecule belongs to point group C 3v . Some molecule... | https://en.wikipedia.org/wiki/Trigonal_pyramidal_molecular_geometry |
Trigonelline is an alkaloid with chemical formula C 7 H 7 N O 2 . It is a zwitterion formed by the methylation of the nitrogen atom of niacin (vitamin B 3 ). Trigonelline is a product of niacin metabolism that is excreted in the urine of mammals. [ 1 ]
Trigonelline occurs in many plants. It has been isolated from the ... | https://en.wikipedia.org/wiki/Trigonelline |
In mathematics , trigonometric interpolation is interpolation with trigonometric polynomials . Interpolation is the process of finding a function which goes through some given data points . For trigonometric interpolation, this function has to be a trigonometric polynomial, that is, a sum of sines and cosines of given ... | https://en.wikipedia.org/wiki/Trigonometric_interpolation |
In the mathematical subfields of numerical analysis and mathematical analysis , a trigonometric polynomial is a finite linear combination of functions sin( nx ) and cos( nx ) with n taking on the values of one or more natural numbers . The coefficients may be taken as real numbers, for real-valued functions. For comple... | https://en.wikipedia.org/wiki/Trigonometric_polynomial |
In mathematics , a trigonometric substitution replaces a trigonometric function for another expression. In calculus , trigonometric substitutions are a technique for evaluating integrals. In this case, an expression involving a radical function is replaced with a trigonometric one. Trigonometric identities may help sim... | https://en.wikipedia.org/wiki/Trigonometric_substitution |
In mathematics , tables of trigonometric functions are useful in a number of areas. Before the existence of pocket calculators , trigonometric tables were essential for navigation , science and engineering . The calculation of mathematical tables was an important area of study, which led to the development of the first... | https://en.wikipedia.org/wiki/Trigonometric_tables |
The trigonometry of a tetrahedron [ 1 ] explains the relationships between the lengths and various types of angles of a general tetrahedron .
The following are trigonometric quantities generally associated to a general tetrahedron:
Let X = P 1 P 2 P 3 P 4 ¯ {\displaystyle X={\overline {P_{1}P_{2}P_{3}P_{4}}}} be a ge... | https://en.wikipedia.org/wiki/Trigonometry_of_a_tetrahedron |
In geometry , the trihexagonal tiling is one of 11 uniform tilings of the Euclidean plane by regular polygons . [ 1 ] It consists of equilateral triangles and regular hexagons , arranged so that each hexagon is surrounded by triangles and vice versa. The name derives from the fact that it combines a regular hexagonal t... | https://en.wikipedia.org/wiki/Trihexagonal_tiling |
The trihydrogen cation or protonated molecular hydrogen ( IUPAC name : hydrogen onium ion ) is a cation (positive ion ) with formula H + 3 , consisting of three hydrogen nuclei ( protons ) sharing two electrons .
The trihydrogen cation is one of the most abundant ions in the universe. It is stable in the interstellar ... | https://en.wikipedia.org/wiki/Trihydrogen_cation |
Trihydrogen oxide is a predicted inorganic compound of hydrogen and oxygen with the chemical formula H 3 O . [ 2 ] [ 3 ] This is still a hypothetical compound , one of the unstable hydrogen polyoxides . It is hypothesized that the compound could constitute a thin layer of metallic liquid around the cores of Uranus and ... | https://en.wikipedia.org/wiki/Trihydrogen_oxide |
In chemistry, triiodide usually refers to the triiodide ion, I − 3 . This anion, one of the polyhalogen ions , is composed of three iodine atoms. It is formed by combining aqueous solutions of iodide salts and iodine . Some salts of the anion have been isolated, including thallium(I) triiodide (Tl + [I 3 ] − ) and ammo... | https://en.wikipedia.org/wiki/Triiodide |
Triiodothyronine , also known as T 3 , is a thyroid hormone . It affects almost every physiological process in the body, including growth and development , metabolism , body temperature , and heart rate . [ 1 ]
Production of T 3 and its prohormone thyroxine (T 4 ) is activated by thyroid-stimulating hormone (TSH), wh... | https://en.wikipedia.org/wiki/Triiodothyronine |
The compound with empirical formula Fe 3 Sn 2 is the first known kagome magnet . It is an intermetallic compound composed of iron (Fe) and tin (Sn) , with alternating planes of Fe 3 Sn and Sn. [ 1 ]
The iron-tin intermetallic forms at around 750 °C (1,380 °F) and naturally assumes a kagome structure. [ 2 ] Quenching ... | https://en.wikipedia.org/wiki/Triiron_ditin_intermetallic |
Triisopropyl silane ( TIPS ) is an organosilicon compound with the formula ( i -Pr) 3 SiH ( i -Pr = isopropyl). This colorless liquid is used as a scavenger in peptide synthesis . It can also act as a mild reducing agent.
In peptide synthesis, TIPS is used as a scavenger for peptide groups being removed from the pept... | https://en.wikipedia.org/wiki/Triisopropylsilane |
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