Polar Effects. Part 14. Inductive Charge Dispersal in Bicyclo[2.2.2]oct-1-yl Cations
作者:Rolf Bielmann、Cyril A. Grob、Dieter Küry、Guo Wei Yao
DOI:10.1002/hlca.19850680810
日期:1985.12.18
The rate constants (log k) for solvolysis of 2-, 3-, and 4-substituted bicyclo[2.2.2]octyl p-nitrobenzenesulfonates 10, 11 and 12, respectively, correlate linearly with the corresponding inductive substituent constants s̀. The formation of the ion pairs 9 is, therefore, controlled by the I effect of neighboring substituents. It follows from the corresponding reaction constants ρ1 of −1.54, −1.12, and
分别对2-,3-和4-取代的双环[2.2.2]辛基对硝基苯磺酸盐10、11和12进行溶剂化的速率常数(log k)与相应的感应取代基常数s 1线性相关。因此,离子对9的形成受相邻取代基的I效应控制。它遵循由相应的反应常数ρ 1 -1.54的,-1.12,和-1.22该电感是最高处位置α〜C(1)。它较低,并且实际上在β和γ位置相等。因此,电荷散布类似于先前在喹啉锂离子7中观察到的。