分子内催化硅氢化合物的脱氢偶联反应

通过分子内五配位硅烷［（ｏ－二甲胺甲基）苯基甲基苯基硅烷］和多种取代酚（Ｘ－Ｃ_６Ｈ_４ＯＨ）的等摩尔反应，研究了Ｘ－Ｃ_６Ｈ_４ＯＨ在与硅烷的脱氢缩合反应中的取代基效应。结果表明，它与氟化物催化的这类反应的活性顺序一致，这说明两种体系具有相似的催化机理。本文还比较了两种不同分子内五配位硅烷的反应活性，结果表明，其活性上的差异与它们分子内对Ｓｉ的配位程度有关。

On the Intramolecular Catalytic Dehydrocoupling of Hydrosilanes

By the equal mole competitive reaction of intramolecular coordinated hydrosilane (o-dimethy-laminomethyl) phenylmethylphenylsilane and various substituted phenols, the substituent effect in X-C6H4OH was studied. The results showed that the order of the activity of the substituent was consistent with that in the dehydrocoupling of hydrosilanes catalyzed by KF, which meant there was a similar mechanism in both the reactions. In addition, the reactivity of two different five-coordinated hydrosilanes was compared, and it was shown that the reactivity depended on the coordination degree of non-shared electron pair of N atom onto Si atom of the hydrosilane.