“Inverse Sandwich” Complexes of Perhalogenated Cyclohexasilane

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• 作者：Xuliang Dai ; Douglas L. Schulz ; Christopher W. Braun ; Angel Ugrinov ; Philip Boudjouk
• 刊名：Organometallics
• 出版年：2010
• 出版时间：May 24, 2010
• 年：2010
• 卷：29
• 期：10
• 页码：2203-2205
• 全文大小：677K
• 年卷期：v.29,no.10(May 24, 2010)
• ISSN：1520-6041

文摘

Perhalogenated cyclohexasilanes, Si₆X₁₂ (X = Cl, Br), were prepared by reaction of Si₆H₁₂ with molecular chlorine or bromine in cold (−89 °C) dichloromethane. Single-crystal structural determination by X-ray analysis shows that the six silicon atoms comprising Si₆Br₁₂ adopt a chair conformation in the solid state. The addition of p-tolunitrile to Si₆X₁₂ (X = Cl, Br) leads to the rapid formation of colorless precipitates. Si₆Br₁₂·2(p-CH₃C₆H₄CN) adopts an “inverse sandwich” structure where the N atoms of the p-tolunitrile molecules are μ₆ bonded and are located above and below the planar hexagonal Si₆ ring.