Zobrazeno 1 - 10
of 17
pro vyhledávání: '"35"'
Autor:
Y. Maeda, K. U. Ingold
Publikováno v:
Journal of the American Chemical Society. 102:328-331
A search for a dialkylaminyl radical which rearranges at a rate suitable for study by kinetic EPR spectroscopy has shown that cyclobutyl-n-propylaminyl is such a species. This radical undergoes ring opening, and the rate constant for this process can
Publikováno v:
Journal of the American Chemical Society. 114:8177-8180
The hydrogen-bonded dimer CH 3 NC...HCl has been isolated in a pulsed jet by keeping the reactive components CH 3 NC and HCl separate until the point at which they expand into the evacuated Fabry-Perot cavity of a pulsed nozzle Fourier-transform micr
Publikováno v:
Journal of the American Chemical Society. 131:9892-9893
For a direct quantitative investigation of the Csp(2)-Csp(2) reductive elimination rate within a catalytic cycle, a novel oxidative coupling system in the presence of a Ni catalyst and desyl chloride as the oxidant is devised. The reaction progress p
Publikováno v:
Journal of the American Chemical Society. 127:10712-10722
A two step synthesis to the isocyanotris(trifluoromethyl)borate anion, [(CF3)3BNC]-, and its isomerization to the cyanotris(trifluoromethyl)borate anion, [(CF3)3BCN]-, at temperatures above 150 degrees C are presented. In the first step (CF3)3BNCH wa
Autor:
Petro Kondratyuk, and J. Karl Johnson, Liang Chen, Stephen A. FitzGerald, Oleg Byl, John T. Yates, Scott Forth
Publikováno v:
Journal of the American Chemical Society. 125:5889-5896
Infrared spectroscopy has been used to make the first experimental discrimination between molecules bound by physisorption on the exterior surface of carbon single-walled nanotubes (SWNTs) and molecules bound in the interior. In addition, the selecti
Autor:
E. C. Abresch, and Melvin Y. Okamura, George Feher, Rafael Calvo, Mark L. Paddock, Wolfgang Lubitz, Wulf Hofbauer, Robert Bittl, R.A. Isaacson
Publikováno v:
Journal of the American Chemical Society. 122:7327-7341
The photocycle of bacterial photosynthetic reaction centers (RCs) involves electron transfer between two quinone molecules, QA and QB. The semiquinone biradical QA-•QB-• forms an intermediate state in this process. We trapped the biradical at low
Publikováno v:
Journal of the American Chemical Society. 122:6357-6363
A high-throughput technique for elucidating Hammett relationships on solid supports and its application to the comparison of various commercially available solid supports is reported. Specifically, we report the use of competition experiments to deri
Publikováno v:
Journal of the American Chemical Society. 120:11784-11795
A combination of solid-state 1H NMR techniques, namely MAS, CRAMPS, and DQ MAS spectroscopy, is used to investigate the hydrogen-bonding properties of a range of alkyl-substituted benzoxazine dimers in the solid state. These dimers are of interest be
Autor:
Krisztina Takács-Novák, Peter I. Nagy
Publikováno v:
Journal of the American Chemical Society. 119:4999-5006
The equilibrium ratios for the zwitterionic and neutral forms of the nicotinic and isonicotinic acids (3- and 4-COOH pyridines) have been determined by spectrophotometry in mixtures of water with methanol, tetrahydrofuran and dioxane. The zwitterioni
Autor:
Mark S. Gordon, Thomas R. Cundiari
Publikováno v:
Journal of the American Chemical Society. 115:4210-4217
An ab initio quantum chemical analysis of HX (X = H, CH[sub 3], Cl, NH[sub 2], SiH[sub 3]) elimination by group IVB (Ti, Zr, Hf) amidos (H[sub 2](X)M-NH[sub 2] [yields] H[sub 2]M-NH + HX), of interest in the context of CVD precusor design, is reporte