Nongeneral Character of the Resonance Parameters ΣR+ of Silicon-, Germanium-, and Tin-Containing Substituents in Radical Cations

被引：0
|
作者：
A. N. Egorochkin
O. V. Kuznetsova
机构：
[1] Russian Academy of Sciences,Razuvaev Institute of Organometallic Chemistry
来源：
Russian Journal of Organic Chemistry | 2005年 / 41卷
关键词：
Silicon; Organic Chemistry; Germanium; Radical Cation; Perturbation Method;
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学科分类号：
摘要：
The resonance parameters σR+ of substituents Y in radical cations YD+· [where D is a π- or n-type center, and Y = MMe3, CH2MMe3 (M = Si, Ge, Sn), C(SiMe3)3] depend on the nature of both Y and D. Using radical cations YD+· (Y = CH2SiMe3, SnMe3) as examples, it was found that the two conjugation parameters, constants σR+ of substituents Y and perturbation energy calculated by the modified molecular orbital perturbation method, are linearly related to each other. The energies of donor and acceptor components of the overall resonance effect of CH2SiMe3 and SnMe3 with respect to radical cation centers D+· were estimated for the first time. The donor energy constituent in YD+· is considerably greater than in neutral DY molecules.
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页码：1407 / 1414
页数：7
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