Results 301 to 310 of about 256,202 (345)
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Steric effects on geminate recombinations
Journal of the American Chemical Society, 1990Steric effects on the binding of isonitrile ligands to iron(II) porphyrins were investigated by picosecond flash photolysis. Two different types of steric effects were distinguished and characterized: (1) steric restrictions to porphyrin planarity and (2) blocking of the pathway for ligand approach.
Douglas Magde +3 more
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Is the Hammett’s Constant Free of Steric Effects?
The Journal of Physical Chemistry A, 2012In this work, we have explored the validity of the hypotheses on which rest the Hammett's approach to quantify the substituent effect on a reaction center, by applying two DFT energy decomposition schemes. This is performed by studying the change in the total electronic energy, ΔΔE, associated with a proton transfer isodesmic equilibrium.
Luis Rincón, Rafael Almeida
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Steric effects in hydrosilylation of styrene
Collection of Czechoslovak Chemical Communications, 1980Hydrosilylation of styrene, 2-phenyl-1-propene, trans-1-phenyl-1-propene by (CH3)R2SiH (R = C2H5, i-C3H7, i-C4H9) and R'3SiH (R' = i-C3H7, t-C4H9) in the presence of [RhCl.{P(C6H5)3}3] (I), [{RhCl(C2H4)2}2] (II) and H2PtCl6 as catalysts has been studied.
Gabriela Kuncová, Václav Chvalovský
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Steric effects in molecular adsorption
The Journal of Chemical Physics, 1988The results of a molecular beam surface scattering experiment with preferentially orientated NO on Ag[111] are given. In adsorption molecules oriented with the O end towards the surface have a larger trapping probability.
M. G. Tenner +3 more
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Substituent effects on steric strain
Chemical Physics Letters, 2003Accurate quantum chemical calculations were performed on a series of mono-substituted tetrahedranes and [3]-prismanes by the high-level ab initio G3/B3LYP method. The relative stabilities of substituted tetrahedranes vs. their [3]-prismane analogues and the influence of substitution on steric strain are discussed.
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Steric Effect of Methylene Groups. I
Journal of the American Chemical Society, 1945Richard T. Arnold +2 more
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Steric effects in polybitniophenes
International Conference on Science and Technology of Synthetic Metals, 1994G. Zotti +8 more
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Radiation therapy‐associated toxicity: Etiology, management, and prevention
Ca-A Cancer Journal for Clinicians, 2021Kyle Wang
exaly
Cancer treatment and survivorship statistics, 2022
Ca-A Cancer Journal for Clinicians, 2022Kimberly D Miller +2 more
exaly