Syntheses of dialkali metal complexes of tetrakis(dimethylsilyl)ethylene: [(HMe2Si)2C=C(SiMe2H)2]2- [M+(ligand)(n)]2. Evidence for SiH-alkali metal agostic interactions

Masaaki Ichinohe, Akira Sekiguchi, Masae Takahashi, Hideki Sakurai

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5 Citations (Scopus)

Abstract

A series of dialkali metal complexes, [(HMe2Si)2C=C(SiMe2H)2]2- [M+(ligand)(n)]2 (M = Li, Na, K, Rb, Cs), were prepared by the reaction of tetrakis(dimethylsilylethylene) with alkali metals. These complexes exhibit Si-H alkali metal agostic interactions and have been characterized by spectroscopic and structural methods. Spectroscopic evidence for the interaction of the hydrogen on the silicon atom with alkali metals include (1) an unusually small value of the silicon-hydrogen coupling constant (1J(Si-H)) in NMR spectra and (2) low-energy Si-H stretching frequency in the infrared spectra. The smallest cation, Li+, can interact with SiH most strongly.

Original languageEnglish
Pages (from-to)1905-1910
Number of pages6
JournalBulletin of the Chemical Society of Japan
Volume72
Issue number8
DOIs
Publication statusPublished - 1999 Aug 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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