作者:John J. Eisch、Goutam Gupta
DOI:10.1016/s0022-328x(00)83269-6
日期:1979.3
The chemical behavior of alkali metal adducts of α,β-unsaturated organosilanes was investigated by generating the adducts with lithium or potassium metal in donor solvents at −78°C and studying the ensuing reduction, bimolecular coupling, cleavage and isomerization processes. Chosen for study were the triphenylvinyl derivatives of silicon, germanium and tin, as well as other vinyl-, phenyl-, allyl-
研究了α,β-不饱和有机硅烷的碱金属加合物的化学行为,方法是在-78°C下在供体溶剂中与锂或钾金属生成加合物,并研究随后的还原,双分子偶联,裂解和异构化过程。选择进行研究的是硅,锗和锡的三苯基乙烯基衍生物,以及其他乙烯基,苯基,烯丙基,1,3-链二烯基,1-炔基和环丙基-硅烷。通过评估取代基对碱金属的反应性等级,确定了硅上这些取代基的电子亲和力的经验顺序:1,3-链二烯基> 1-炔基> 1-链烯基>苯基>> 2-链烯基或环丙基。ESR数据可用于解释自由基阴离子中间体的反应性和观察到的反应途径。p π →交通d π稳定化。