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id stringlengths 40 40	title stringlengths 15 120	text stringlengths 41 3.14k	source stringclasses 2 values
648700e6967dc8ef8fcb10af5cee99d463cfa5d6	phosphaallenes can coordinate in an ɳ or ɳ	phosphaallenes can coordinate in an ɳ or ɳ fashion depending on the metal and experimental conditions. recent studies into the coordination behavior of the 3h-phosphaallene with tungsten (w) show that both stable and unstable phosphaallenes can bond to w through and ɳ -coordination mode via a p-w bond. due to the stabi...	wikipedia
8a4e049ab2c6194f0c26c5df4a7cc88efe76b523	nucleophilic alkoxide as well as n-buli will add	nucleophilic alkoxide as well as n-buli will add to the p=c bond of a phosphaallene. as seen in the reaction scheme, the central c atom is the preferred location for proton attack due to the partial negative charge it possesses.	wikipedia
8d8fd234c5b83c9fcf30871b545f9d27358730b8	without a large steric hindrance, most phosphaallenes quickly	without a large steric hindrance, most phosphaallenes quickly dimerize in a - or - cycloaddition to yield four- or five-membered rings. thus, in order to prevent dimerization, a bulky moiety such as mes* is often used. dimerization frequently occurs in a head-to-tail manner, exhibiting coupling between either the two c...	wikipedia
f9be4aa759ff2297475f1c2d119037e5211f891f	in 2022, the most notable aspect of 1-phosphaallenes	in 2022, the most notable aspect of 1-phosphaallenes is their reactivity. phosphaallenes contain three reactive centers: the p=c bond, the c=c bond, and the phosphorus atom. the p=c bond and the c=c bond are thought to be electronically independent of one another. this gives rise to a wide variety of reactivity, which ...	wikipedia
ca9fcb57cdad7e3007c1e7f215fb94a6df70dd8a	in 2019, a new synthetic route for the	in 2019, a new synthetic route for the synthesis of phosphaallenes was reported by klöcker and coworkers. the hydroalumination of dialkynylphosphines with different alkylaluminium hydrides resulted in the elimination of dialkylaluminium alkynides and the desired phosphaallenes. many of the phosphaallenes klöcker and co...	wikipedia
b046a1b6425b43cf454c6ebb7ba50306bf537e76	(z)-2,5-dibromo-1-phosphapent-1-ene with the sterically cumbersome mes moiety was	(z)-2,5-dibromo-1-phosphapent-1-ene with the sterically cumbersome mes moiety was reacted with t-buok to yield the cyclopropylidenephosphaethene product. treatment of the (z)-2,5-dibromo-1-phosphapent-1-ene reagent with a weaker base, etona yields a non-cyclic isomer that can undergo cyclization in the presence of t-bu...	wikipedia
fe188341fb8292d8341555b28d0c02aa0a54b557	in this synthetic route, a dichlorocarbene is first	in this synthetic route, a dichlorocarbene is first reacted with a phosphaethylene. the addition of t-buli to the resulting 2,2-dichlorophosphirane yields the phosphaallene. this route includes an insertion of carbon into the p=c bond of a phosphaalkene.	wikipedia
03ca9288ca6aa973e42a637ed168bc7f1afd9875	the dehydrochlorination of 1-chlorovinylphosphine by dbu (1,8-diazabicyclo-undec-7-ene) yields	the dehydrochlorination of 1-chlorovinylphosphine by dbu (1,8-diazabicyclo-undec-7-ene) yields a variety of results, depending on the structure of the initial chlorovinylphosphine. many of these reactions require temperatures between -90 °c and 0 °c to ensure a stable product is formed. as many of these reactions are w...	wikipedia
6b5bb434f4b13395b33124b469b48e1ea08a1b0d	multiple stable phosphaallenes have been synthesized from lic≡cr	multiple stable phosphaallenes have been synthesized from lic≡cr and arp(h)cl (r = ph, t-bu, me, ch osime). the basicity of the lithium complex is essential to the success of these reactions.	wikipedia
c4b5393e720846c9c6a1d315d32e5950af328a6d	like the transition from an alkyne to an	like the transition from an alkyne to an allene in organic chemistry, phosphaallenes can be synthesized from alkynylphosphines by adding a strong base such as n-butyllithium (n-buli). these complexes are typically useful due to the broad range of stable products that can be obtained from this synthetic route.	wikipedia
653595e3a7aab2cfe66c2929ca88fab77c2a33ab	the phospha-wittig-horner reaction, first reported by mathey et	the phospha-wittig-horner reaction, first reported by mathey et al. in 1992, was initially developed as a synthetic route to convert aldehydes and ketones into c-mono and c,c-disubstituted phosphaalkenes, respectively. this method was then adapted to rapidly synthesize phosphaallenes by reacting phosphaketenes with an ...	wikipedia
a3cd555ab24f2a0a20d80fb9001fda7d3740b15c	multiple synthetic routes to 1-phosphaallenes have been reported.	multiple synthetic routes to 1-phosphaallenes have been reported. the most common are phospha-wittig-horner reactions, rearrangement of alkylynlphosphines with a base present, dehydrochlorination of a chlorovinylphospine, and the reaction of lithium with a c,c-dichlorophosphirane. more recent synthetic advances include...	wikipedia
56245c74a9cdecec7854430208600da60ea14bca	the first example of a stable heteroalkene e=c	the first example of a stable heteroalkene e=c or e=e' (e, e' = p) containing a heavy group 15 element was reported in 1982 by yoshifuji. after the realization of heavier heteroalkenes, the field of organometallic chemistry began exploring the idea of heteroallenes e=c=e' and e=c=c=e', in which one or more carbon atom ...	wikipedia
5a7e5d4da9f0f5f836c446ccd309ee42923658e0	during the 1966–67 english football season, brentford competed	during the 1966–67 english football season, brentford competed in the football league fourth division. in a season overshadowed by the events of 19 january 1967, a promotion charge was derailed by five defeats in the final six matches of the campaign.	wikipedia
f9986c5c0e73490cb9661b64952e7da60fab6703	the bees had a good start to the	the bees had a good start to the season, winning the first two matches to sit top of the fourth division, but despite the strikeforce being bolstered by experienced brian bedford, a winless run of five defeats in eight matches dropped the club into the relegation places in mid-october 1966. manager billy gray then made...	wikipedia
355176b5b2e90517c3fc36380ce8defd5a100558	in a bid to buy brentford out of	in a bid to buy brentford out of the bottom two divisions of the football league, the large transfer funds made available by chairman jack dunnett to previous managers malky macdonald and tommy cavanagh had left the club with mounting debts. cavanagh had spent £30,000 on seven players since being appointed to the manag...	wikipedia
5a7e5d4da9f0f5f836c446ccd309ee42923658e0	during the 1966–67 english football season, brentford competed	during the 1966–67 english football season, brentford competed in the football league fourth division. in a season overshadowed by the events of 19 january 1967, a promotion charge was derailed by five defeats in the final six matches of the campaign.	wikipedia
bf4cdad11924cf5cc8552de9ffd1857371c501eb	robert alexander burns was a canadian professional ice	robert alexander burns was a canadian professional ice hockey left wing who played 19 games in the national hockey league with the chicago black hawks between 1928 and 1930. burns spent most of his career, which lasted from 1925 to 1939, in the american hockey association (aha).	wikipedia
caee5e29f85ca48c7252e88f9d52eaafaa5f5169	burns began his professional career in 1926 with	burns began his professional career in 1926 with eddie livingstone 's chicago cardinals of the aha. after the team was forced out of business by the nhl, the aha assigned his rights to the chicago black hawks. he played one game with the hawks and the rest of the season for the duluth hornets. in 1928–29, he played in ...	wikipedia
7f73c17755a60d56fb936152dcc8f546e9a3f545	robert alexander burns (april 4, 1905 – august	robert alexander burns (april 4, 1905 – august 12, 1995) was a canadian professional ice hockey left wing who played 19 games in the national hockey league with the chicago black hawks between 1928 and 1930. burns spent most of his career, which lasted from 1925 to 1939, in the american hockey association (aha).	wikipedia
c7ae5dd59eeee85c22b6ff76ef8a40581a0574ea	brian a. wandell is the isaac and madeline	brian a. wandell is the isaac and madeline stein family professor at stanford university, where he is director of the stanford center for cognitive and neurobiological imaging, and deputy director of the wu tsai neuroscience institute.	wikipedia
90921145bf19fc2bef8ef722989d54e825cf7b19	along with laurence maloney, wandell was awarded the	along with laurence maloney, wandell was awarded the national academy of sciences' troland research award in 1987 "for their elegant account of how we preserve the inherent colors of surfaces despite wide variations in illumination, and of wandell's other fundamental investigations of color vision." in 2008, he receive...	wikipedia
c679df15c8d30f80533792b5c55da3f1f8d1e672	an overall effort of the wandell lab involves	an overall effort of the wandell lab involves sharing data and computational methods with the broader scientific community. this work, which was funded by a grant from the national science foundation, supports that effort by providing data and a complete implementation of the method through the stanford digital reposit...	wikipedia
ea1f649724901b1c67d7c3742588b79d0ec340a2	the wandell lab is also studying human brain	the wandell lab is also studying human brain development. specifically, they are measuring the responses in visual cortex of children, aged 8–12, as the children become skilled readers. he and his group are hoping to understand how visual signals and structures must develop to permit rapid, skilled reading. this work i...	wikipedia
1901b4113b872d81e56ff8ada254197b9e2c0522	his work in visual neuroscience uses both functional	his work in visual neuroscience uses both functional mri and computational modeling to understand the action of the visual portions of the brain. his laboratory has worked to develop methods for identifying and measuring visual field maps in visual cortex. recently, he and members of the laboratory have measured the re...	wikipedia
263803a38c8fa75a86f867b346ce77135ea2c7fa	brian a. wandell is the isaac and madeline	brian a. wandell is the isaac and madeline stein family professor at stanford university, where he is director of the stanford center for cognitive and neurobiological imaging, and deputy director of the wu tsai neuroscience institute. he was a founding co- editor of the annual review of vision science.	wikipedia
5aa2c0d25939d590a62b3f700d042fcc6f60d0da	in 1950, he was elected a fellow of	in 1950, he was elected a fellow of the royal society for " his work on the digestive glands, conditioned reflexes and the cortical representation of autonomically innervated organs. he demonstrated that a) the three pancreatic enzymes are secreted in parallel, b) sympathetic and parasympathetic fibres innervate differ...	wikipedia
1ac373e0a440a605c6706cb39d50a248f4a8ee05	in 1928 babkin became a research professor at	in 1928 babkin became a research professor at mcgill university, montreal, under prof john tait, where he spent the remainder of his career. he chaired the physiology department between 1940 and 1941, following tait's retirement, and, following his retirement, was invited to become research fellow of neurosurgery by wi...	wikipedia
39d2aba7b44227319a49f4934c8ed491a8ea7a6b	babkin graduated from the military medical academy, st.	babkin graduated from the military medical academy, st. petersburg, with a doctor of medicine degree in 1904. he held professorships at the novo-alexandria agricultural institute and the university of odessa, before being imprisoned and exiled from russia in 1922, due to his criticism of the october revolution.	wikipedia
d3b2d0f0451eaf179805c36ee823ec0c1a547879	boris petrovitch babkin frs, m.d., d.sc, ll.d (russian:	boris petrovitch babkin frs, m.d., d.sc, ll.d (russian: Бори́с Петро́вич Ба́бкин; 17 january 1877 – 3 may 1950) was a russian-born physiologist, who worked in russia, england and canada.	wikipedia
8d54699ea168713f004560c19c5b1a2848b1d031	the 1975–76 minnesota golden gophers men's ice hockey	the 1975–76 minnesota golden gophers men's ice hockey team represented the university of minnesota in college ice hockey. in its 4th year under head coach herb brooks the team compiled a 28–14–2 record and reached the ncaa tournament for the third consecutive year and seventh all-time. the golden gophers defeated michi...	wikipedia
cca18e2a499bb27a05255889f7df4704034eff60	tom vannelli's 5 points in the title tile	tom vannelli's 5 points in the title tile earned him the tournament mop, however, for the only time in its history the ncaa did not name an all-tournament team. no minnesota players were named to the ahca all-american west team and only reed larson made an appearance on an all-wcha team, earning first-team honors.	wikipedia
df71430ade7b3f5c66431908ae2f1650812f7889	minnesota's second championship in three years was even	minnesota's second championship in three years was even more improbable that their first and the 1976 golden gophers became the first team since the 1948–49 boston college eagles to have a national champion composed entirely of american players. furthermore, with jim boo having been raised in minnesota they were the se...	wikipedia
c427d2f70229882a20c63cb09f90d1ae6d98057d	as they had two years earlier, minnesota opened	as they had two years earlier, minnesota opened as the underdog against ecac champion boston university and just like 1974 the gophers were able to send the terriers packing. in the championship game minnesota met michigan tech for the third consecutive year, the only time in ncaa where the same two team made the final...	wikipedia
4979fc0ea64ffd00cdbd0be9a956ea74405b7564	despite their mediocre finish, minnesota managed to hold	despite their mediocre finish, minnesota managed to hold onto home ice for the first round of the wcha tournament and played host to colorado college. the gopher defense stepped up in the first game and gave minnesota a 4-goal margin of victory that allowed the team to cruise to a 10–5 series win after taking the secon...	wikipedia
a6703bd111346834c5c0a4ebfb185b068dc9012f	the gophers began 1976 with a series against	the gophers began 1976 with a series against the defending national champions, michigan tech and while they split the series, the two teams combined for 25 goals in the two games. minnesota then took seven out of eight points against notre dame and denver before visiting michigan and dropping both contest to the surpri...	wikipedia
fc8c53b6546da14b9051727a7789b9e56c0d5ee6	after a disappointing end to what was otherwise	after a disappointing end to what was otherwise a tremendous season, minnesota entered the 1975–76 campaign with a fairly young team. herb brooks ' squad had only two seniors and four juniors leaving the team rather shorthanded in terms of experience. the gophers' didn't let their youth stand in the way of a fast start...	wikipedia
8d54699ea168713f004560c19c5b1a2848b1d031	the 1975–76 minnesota golden gophers men's ice hockey	the 1975–76 minnesota golden gophers men's ice hockey team represented the university of minnesota in college ice hockey. in its 4th year under head coach herb brooks the team compiled a 28–14–2 record and reached the ncaa tournament for the third consecutive year and seventh all-time. the golden gophers defeated michi...	wikipedia
746077365b959e5805c632c689c9b2f3a34ea15c	170 is the largest integer for which its	170 is the largest integer for which its factorial can be stored in ieee 754 double-precision floating-point format. this is probably why it is also the largest factorial that google 's built-in calculator will calculate, returning the answer as 170! = 7.25741562 × 10.	wikipedia
6517daee9e9f7f940b202267662dd73b279fe26e	170 is the smallest n for which φ(n)	170 is the smallest n for which φ(n) and σ(n) are both square (64 and 324 respectively). but 170 is never a solution for φ(x), making it a nontotient. nor is it ever a solution to x - φ(x), making it a noncototient.	wikipedia