Three-Electron S<sub>N</sub>2 Reactions of Arylcyclopropane Cation Radicals. 2. Steric and Electronic Effects of Substitution<sup>1</sup>
作者:J. P. Dinnocenzo、H. Zuilhof、D. R. Lieberman、T. R. Simpson、M. W. McKechney
DOI:10.1021/ja963112s
日期:1997.2.1
studies, time-resolved laser flash photolysis, kinetic isotope effects, and quantum chemical calculations. The reactions were found to proceed stereospecifically with inversion of configuration, with high regioselectivity for nucleophilic attack at the more substituted carbon atom, and with very small steric effects. Electronic effects on the nucleophilic substitution regiochemistry and the rate constants
通过产品研究、时间分辨激光闪光光解、动力学同位素效应和量子化学计算等方法的组合,研究了取代芳基环丙烷阳离子自由基的亲核取代反应。发现反应立体定向地进行构型反转,对更多取代的碳原子的亲核攻击具有高区域选择性,并且具有非常小的空间效应。发现对于环丙烷部分和芳环上的取代基,电子对亲核取代区域化学和速率常数的影响很大。