Mechanistic aspects of the platinum catalysed hydrosilylation of PhCCH2 with Et3SiH
作者:W. Caseri、P.S. Pregosin
DOI:10.1016/0022-328x(88)83096-1
日期:1988.11
Kinetic measurements and 1H, 2H and 195Pt NMR studies have been carried out on the platinum catalysed hydrosilylation of styrene with triethylsilane. With trans-PtCl2(PhCHCH2)2 as catalyst precursor there is a short period during which reduction and product development take place, but with Pt(PhCHCH2)3 the product development is linear and a plot of the yield of product against time passes through the
动力学测量以及1 H,2 H和195 Pt NMR研究已经在铂与三乙基硅烷催化的苯乙烯氢化硅烷化反应中进行。与反式-PtCl 2(PhCHCH 2)2作为催化剂前体有一个短周期,在此期间降低和产品的开发进行,但有Pt(PhCHCH 2)3的产品开发线性和产量的曲线图随时间变化的产品数量通过了原点。对涉及Et 3 SiD的反应进行的速率测量显示,整体氘动力学同位素效应约为。3.6。195Pt NMR研究显示1 J(Pt,H)值为605 Hz的中间体的形成,这表明它是一种类似氢化物的络合物。数据暗示了速率确定步骤,其中配位苯乙烯插入PtH键中。