Steric and electronic effects on the oxidation of ortho-substituted benzhydrols by chromic acid
作者:D.G. Lee、M. Raptis
DOI:10.1016/s0040-4020(01)83387-1
日期:1973.1
A study has been made of the oxidation of a number of substituted benzhydrols by chromic acid in aqueous acetic acid. The reaction rate constants are linearly proportional to the KR+ values of the alcohols. ortho-Substitution increases the rate of reaction and reduces the magnitude of the primary kinetic isotope effect. The major result of steric crowding appears to be an increase in the energy of
已经研究了乙酸水溶液中铬酸对许多取代的苯酚的氧化作用。反应速率常数与醇的K R +值成线性比例。邻位取代可提高反应速率并降低一级动力学同位素效应的强度。空间拥挤的主要结果似乎是反应物能量的增加,而取代基的主要电子效应是使过渡态稳定或不稳定。