In search for a pentacoordinated monoorgano stannyl cation

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• 作者：Mikhail S. Nechaev ; Oleg V. Chernov ; Ivan A. Portnyagin ; Victor N. Khrustalev ; Rinat R. Aysin ; Valery V. Lunin
• 关键词：Pentacoordinated monoorgano stannyl cation ; Stannylene ; Weakly coordinating anion
• 刊名：Journal of Organometallic Chemistry
• 出版年：2010
• 出版时间：1 February 2010
• 年：2010
• 卷：695
• 期：3
• 页码：365-369
• 全文大小：384 K

文摘

Alkylation of Sn(OCH₂CH₂NMe₂)₂ (1) by MeI or MeOTf leads to a mixture of quaternary ammonium salts by alkylation of the NMe₂ moiety. Reaction of Sn(acac)₂ (2) with MeOTf gives unexpected redistribution product Sn(acac)OTf (3), which is a rare example of mono acetylacetonato tin (II) derivatives. Pentacoordinated monoorgano stannyl cation was generated by salt metathesis from PhSn(OCH₂CH₂NMe₂)₂Cl (5) and Ag[Al(OCH(CF₃)₂)₄] or Ag[B(C₆F₅)₄]. This cation was not isolated due to its strong electrophilic nature. It abstracts substituents from aluminate and borate weakly coordinating anions (WCAs) leading to redistribution products [Al[OCH(CF₃)₂]₂OCH₂CH₂NMe₂]₂ (6) and [Ph(C₆F₅)Sn(OCH₂CH₂NMe₂)₂][H₂OB(C₆F₅)₃] (9), respectively. Structures of 3 and 6 were established by single-crystal X-ray diffraction analysis.