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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Monomeric siliconthiodichloride trapped by a Lewis base
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Monomeric siliconthiodichloride trapped by a Lewis base

机译：路易斯碱捕获的单体二硫代二氯化硅

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摘要

Thiophosgene (CSCl2), a chemical reagent used in numerous organic syntheses, exists in the monomeric form while its heavier silicon analogue [siliconthiodichloride (SiSCl2)] has been isolated so far as a dimer at room temperature and as a tetramer at 180 degrees C. Herein, we report on the first synthesis, isolation, and characterization of cyclic alkyl(amino) carbene (cAAC) stabilized siliconthiodichloride (cAAC) SiSCl2 (3) in the neutral monomeric form. 3 is synthesized via reaction of (cAAC(center dot))(2)Si2Cl4 (1) or (cAAC)(2)Si2Cl2 (2) with S-8 in the temperature range of -78 to 20 degrees C. An NHC [NHC = N-heterocyclic carbene] analogue of 3 is not isolated when (NHC) SiCl2 is reacted with S-8. The bright yellow colored compound 3 is soluble in polar organic solvents. It is stable at room temperature for a month under an inert atmosphere. 3 decomposes above 160 degrees C. The monomeric molecular structure of 3 has been unambiguously confirmed by X-ray single crystal diffraction. 3 is also characterized by NMR, UV-vis, and IR spectroscopy. The bonding and electron density distributions of 3 have been further studied by theoretical calculations.
机译：硫光气（CSCl2）是许多有机合成中使用的化学试剂，以单体形式存在，而其重硅类似物[siliconthiodichloride（SiSCl2）]已被分离为室温下的二聚体和180°C下的四聚体。在本文中，我们报告了中性单体形式的环状烷基（氨基）卡宾（cAAC）稳定化的硫代二氯化硅（cAAC）SiSCl2（3）的首次合成，分离和表征。通过在-78至20℃的温度范围内，（cAAC（中心点））（2）Si2Cl4（1）或（cAAC）（2）Si2Cl2（2）与S-8的反应合成图3。当（NHC）SiCl2与S-8反应时，未分离到3的NHC = N-杂环卡宾]类似物。亮黄色化合物3可溶于极性有机溶剂。在惰性气氛下于室温下稳定一个月。 3在160℃以上分解。3的单体分子结构已通过X射线单晶衍射明确地确认。图3的特征还在于NMR，UV-vis和IR光谱。通过理论计算进一步研究了3的键合和电子密度分布。

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