PENTACOORDINATED SILICON ANIONS - SYNTHESIS AND REACTIVITY .1.

被引：47

作者：

BREFORT, JL ^{[1
]}

CORRIU, RJP ^{[1
]}

GUERIN, C ^{[1
]}

HENNER, BJL ^{[1
]}

WONGCHIMAN, WWC ^{[1
]}

机构：

[1] UNIV MONTPELLIER 2,CNRS,UA 1097,HETEROCHIM & AMINO ACIDES LAB,PL EUGENE BATAILLON,F-34095 MONTPELLIER 05,FRANCE

来源：

ORGANOMETALLICS | 1990年 / 9卷 / 07期

关键词：

D O I：

10.1021/om00157a016

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Pentacoordinated anionic siliconates Ph3Si(OMe)2-K+(18-crown-6), Ph2Si(OMe)3-K+(18-crown-6), Ph3SiF2-K+(18-crown-6), and MePhSiF3- K+(18-crown-6) reacted with nucleophiles (RMgX, RLi, ROLi, LiAlH4) to give the neutral tetravalent substituted silicon derivatives. Reactivity comparisons between Ph3SiX2-K+(18-crown-6) and Ph3SiX (X = F, OMe) showed that the pentavalent anionic species is more reactive than the tetravalent analogue toward nucleophiles. Hydrolysis reactions of Ph3SiF2-K+(18-crown-6) and Ph3Si(OMe)2-K+(18-crown-6) gave respectively Ph3SiF and a mixture of Ph3SiOMe and Ph3SiOH. Results clearly indicate that nucleophilic attack at pentacoordinated silicon species is a general process. Moreover, the data point out the enhanced reactivity of these species that may mainly arise from a general loosening of the bonds around silicon. © 1990, American Chemical Society. All rights reserved.

引用

页码：2080 / 2085

页数：6

共 53 条

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