作者:Oleg Golubev、Dmitri Panov、Anu Ploom、Ants Tuulmets、Binh T. Nguyen
DOI:10.1016/j.jorganchem.2007.05.009
日期:2007.8
the resonance effect of substituents at least in nucleophilic displacement reactions at the silicon center. An attempt to calculate the steric constants for polar substituents was made. It appeared that the inductive constants σ∗ derived from the carbon chemistry are not applicable to the silicon chemistry. New scales of parameters for description of polar and steric effects in the organosilicon chemistry
在伪一级反应条件下,使用过量的格氏试剂,研究了乙基氯化镁和苯基氯化镁与氯硅烷RMeSiCl 2的反应动力学。烷基取代的硅烷的速率常数与E s(Si)空间参数密切相关。良好的线性速率的数据的相关性为取代的苯基衍生物与σ 0感应常数与文献数据的相关性排除取代基中至少在亲核置换反应在硅中心共振效应在一起。尝试计算极性取代基的空间常数。似乎感应常数σ ∗源自碳化学的元素不适用于硅化学。需要创建用于描述有机硅化学中极性和空间效应的新参数标度。