Evidence for σ-π interaction in some allyltin compounds. UV photoelectron spectroscopy and LCBO calculations
作者:Carla Cauletti、Claudio Furlani、Felice Grandinetti、Daniele Marton
DOI:10.1016/0022-328x(86)80449-1
日期:1986.11
A series of allyltin compounds, R3-nClnSnCH2CH=CH2 (R = Me, n-Bu; n = 0-2) and Ph3SnCH2CH=CH2, have been studied by gas-phase UV photoelectron spectroscopy, in order to determine the extent, if any, of σ-π conjugation (hyper-conjugation) between the σ(SnCH2) bond and the π(CC) orbital of the allyl group. Analysis of the spectra, supported by a fragment analysis based on LCBO (Linear Combination of
一系列的烯丙基锡化合物中,R 3- Ñ氯Ñ SNCH 2 CH = CH 2(R = Me中,正丁基; ñ = 0-2)和pH 3 SNCH 2 CH = CH 2,已经研究了通过气相UV光电子光谱法中,为了确定在何种程度,如果有的话,则σ之间σ-π共轭(超缀合)的(SnCH 2)键和烯丙基的π(CC)轨道。光谱分析得到了基于LCBO(键轨道的线性组合)计算的碎片分析的支持,表明超共轭作用于该系列的所有成员,从R = Me到R = n-Bu传递的程度减小并且在每个系列中,随着n的增加。