Formation of branched silanes via regiospecific hydrosilylation of vinylsilanes

被引：14

作者：

Fu, PF ^{[1
]}

机构：

[1] Dow Corning Corp, Midland, MI 48686 USA

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2006年 / 243卷 / 02期

关键词：

hydrosilylation; metallocene catalysis; regio-selectivity; branched silane; 2,1-addition;

D O I：

10.1016/j.molcata.2005.08.032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Metallocene complexes of type Cp'2MCH(TMS)(2) (Cp' =eta(5)-Me5C5, M = Y, Sm), Me2SiCp2"SmCH(TMS)(2) (Cp" =eta(5)-Me4C5) catalyze rapid and clean hydrosilylation of CH2=CH-SiMe2R (R = Me, Ph, NMe2, O'Bu) with PhSiH3. The distribution of 1,2-addition product versus 2, 1-addition product was found to be sensitive to both catalysts and substrates. Generation of 2, 1-addition product can best be achieved by use of more sterically accessible catalysts as well as substrates containing tethering functional groups. A. four-centered transition state is invoked to explain these effects. [GRAPHICS] (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：253 / 257

页数：5

共 48 条

[1]

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[2]

CAPKA M, 1973, COLLECT CZECH CHEM C, V38, P3830

[3] Synthesis, catalytic Si-Si dehydrocoupling, and thermolysis of polyvinylsilanes [CH2CH(SiH2X)]n (X=H, Ph) [J].