Pentacoordinated nitrogen atoms in the structure of hexalithium bis[methylsilyl-tris(methylimide)] hexakis(tetrahydrofuran)

Gerald Huber, Alexander Jockisch, Hubert Schmidbaur

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Lithiation of tris(methylamino)methylsilane using an excess of n -butyllithium affords the corresponding trifunctional lithium amide in high yield. The compound crystallizes from tetrahydrofuran as a dimer with six donor molecules: {[MeSi(NMeLi)3]2(thf)6}. The cluster is a cage structure grouped around a crystallographic center of inversion. The silicon and lithium atoms are tetrahedrally tetracoordinated, but the nitrogen atoms are pentacoordinated and have a square pyramidal environment of one carbon, one silicon, and three lithium atoms. Parallels can be drawn to other species with polymetallated nitrogen functions. An analogous compound was prepared from tris(methylamino)vinylsilane.

Original languageEnglish
Pages (from-to)8-12
Number of pages5
JournalZeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
Volume54
Issue number1
DOIs
StatePublished - Jan 1999
Externally publishedYes

Keywords

  • Crystal structure
  • Silylamides
  • Silylamines

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