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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Dihypersilylstannylene and dihypersilylplumbylene - two Lewis-amphoteric carbene homologues
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Dihypersilylstannylene and dihypersilylplumbylene - two Lewis-amphoteric carbene homologues

机译:二氢甲硅烷基亚锡和二亚甲基二甲苯基-两个路易斯两性卡宾同系物

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摘要

Dihypersilylstannylene [(Me3Si)(2)Si](2)Sn (1) and dihypersilylplumbylene [(Me3Si)(3)Si](2)Pb (2) are Lewis-amphoteric compounds, i.e. they may behave as Lewis-acid and/or as Lewis-base. Quantum-chemical calculations indicate that their Lewis-acidity is strongly enhanced compared with their diorganyl substituted relatives by the electropositive silyl substituents present. Furthermore silyl substituents are expected to migrate more easily than organyl groups, due to relatively weak E-Si bonds formed to the heavier Group 14 congeners (tetrels) leading to different reaction patterns. Here I will give a brief report about our recent investigations on the chemical behavior of the title compounds towards other Lewis-acidic or Lewis-basic or Lewis-amphoteric species. (C) 2002 Elsevier Science Ltd. All rights reserved. [References: 47]
机译:二氢甲硅烷基亚锡[(Me3Si)(2)Si](2)Sn(1)和二亚氢杂亚丙基[[Me3Si](3)Si](2)Pb(2)是路易斯两性化合物,即它们可能表现出路易斯酸和/或作为Lewis-base。量子化学计算表明,与它们的二有机基取代的亲戚相比,通过存在的正电硅烷基取代基,其路易斯酸度大大提高。此外,由于形成于较重的第14族同类物(骨架)的相对弱的E-Si键导致不同的反应模式,因此甲硅烷基取代基比有机基团更易于迁移。在这里,我将简要介绍一下我们最近对标题化合物对其他路易斯酸性或路易斯碱性或路易斯两性物种的化学行为进行的研究。 (C)2002 Elsevier ScienceLtd。保留所有权利。 [参考:47]

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