Tertiary trisilyloxonium ion in cationic ring-opening polymerisation of a model cyclic siloxane, octamethyl-1,4-dioxatetrasilacyclohexane

被引：14

作者：

Cypryk, M ^{[1
]}

Kurjata, J ^{[1
]}

Chojnowski, J ^{[1
]}

机构：

[1] Polish Acad Sci, Ctr Mol & Macromol Studies, PL-90363 Lodz, Poland

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2003年 / 686卷 / 1-2期

关键词：

cyclic siloxanes; octamethyl-1,4-dioxatetrasilacyclohexane; ring-opening polymerisation; Si-29; -NMR; ab initio calculations;

D O I：

10.1016/S0022-328X(03)00452-2

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The formation of the cyclic trisilyloxonium ion is observed by the Si-29-NMR spectroscopy as a result of hydride transfer reaction between triethylsilane and Ph3C+ B(C6F5)(4)(-) in the presence of octamethyl-1,4-dioxatetrasilacyclohexane, D-2(2). This ion is transformed by the reaction with another D-2(2) molecule into the cyclic trisilyloxonium ion at the polymer chain end. The mechanism of polymerisation of D-2(2) is discussed in relation with the mechanism of polymerisation of cyclic siloxanes. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：373 / 378

页数：6

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