Zobrazeno 41 - 50
of 51
pro vyhledávání: '"35"'
Autor:
William H. Saunders, Rm. Subramanian
Publikováno v:
Journal of the American Chemical Society. 106:7887-7890
In E2 reactions of PhCH/sub 2/CH/sub 2/X (Ph-phenyl; x - N(CH/sub 3/)/sub 3/ of NMe/sub 3/, SMe/sub 2/, OT, Br) containing tracer amounts of PhCHTCH/sub 2/X, secondary ..beta..-tritium isotope effects can be determined from the activity of reactant (
Publikováno v:
Journal of the American Chemical Society. 109:1916-1920
The one-electron reduction of Cr"'(EDTA)at a mercury electrode was studied by an AC impedance technique in aqueous solutions of different viscosities (varied by addition of sucrose). The standard rate constant of the heterogeneous electron transfer,
Autor:
Allen Krantz, Jerzy Gebicki
Publikováno v:
Journal of the American Chemical Society. 106:8093-8097
Phenol has been matrix-isolated in argon, nitrogen, and carbon monoxide. The magnitude of the shifts of key OH bands from gas-phase values indicates that phenol-matrix interactions increase in the series Ar < N/sub 2/ < CO. Phenol forms a 1:1 complex
Autor:
Lester Andrews, Sefik Suezer
Publikováno v:
Journal of the American Chemical Society. 109:300-304
One-to-one complexes between Li, Na, K, and Cs atoms and NH/sub 3/ have been studied by using matrix IR spectroscopy. New bands at 1133, 1079, 1064, and 1049 cm/sup -1/ are assigned to perturbed nu/sub 2/ modes, and bands at 3277, 3294, 3292, and 328
Autor:
R.L. Heppolette, R.E. Robertson
Publikováno v:
Journal of the American Chemical Society. 83:1834-1838
Rate data for the hydrolysis of isopropyl bromide in deuterium oxide are determined over a temperature of 35 to 80 deg . By comparison with earlier data for hydrolysis in water, it was shown that the solvent isotope effect (k/sub D// sub 2//sub O// k
Autor:
E. Lee Purlee
Publikováno v:
Journal of the American Chemical Society. 81:263-272
The Gross-Butler theory for the solvent isotope effect of deuterium on acid-catalyzed reaction rates in thermodynamic activity function, Q' (n), for proton and deuteron at 25 deg are derived from experimental data by using the correct value for the i
Autor:
Thomas J. Lane, Kenneth P. Quinlan
Publikováno v:
Journal of the American Chemical Society. 82:2994-2997
The acid dissociation constants were determined potentiometrically for benzimidazole, 2-methylbenzimidazole and 2-ethylbenzimidazole in solutions of ionic strength 0.16 M (NaNO/sub 3/) at4 plus or minus 1, 25 plus or minus .1, and 35 plus or minus 0.
Publikováno v:
Journal of the American Chemical Society. 105:6318-6320
The reduction has been effected by using a variety of Pd (palladium)-based catalysts. The typical procedure was to suspend 0.25 g of catalyst in 25 cc of an aqueous solution of sodium bicarbonate purged slowly with hydrogen gas. The sodium formate co
Autor:
Burch B. Stewart, Hilton A. Smith
Publikováno v:
Journal of the American Chemical Society. 82:3898-3900
Deuterium gas exchanges slowly with liquid methanol over Raney nickel catalyst at 35 deg . The reaction is zero order with respect to deuterium pressure and has a low activation energy. The influences of catalyst weight, catalyst treatment, and of th
Publikováno v:
Journal of the American Chemical Society. 111:8947-8948
The search for organometallic complexes that emit in fluid solution at room temperature has been intensely pursued for the past 35 years because of the importance of an understanding of excited-state properties to the areas of solar energy conversion