Synthesis and characterisation of alkali metal bis(dimethylsilyl) amides: Infinite all-planar laddering in the unsolvated sodium derivative

Jorg Eppinger, Eberhardt Herdtweck, Reiner Anwander*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

The synthesis of the bis(dimethylsilyl)amide complexes [MN(SiHMe2)2] (M = Li (1), Na (2), K (3)) was accomplished in high yield (>95%) by various standard procedures. Additionally, a novel trans-silylamination reaction has been applied to synthesize the sodium derivative 2. The alkali metal amide complexes which are readily soluble in aliphatic hydrocarbons were characterised by means of IR and 1H, 13C and 29Si NMR spectroscopy. A single crystal X-ray diffraction study of the sodium derivative 2 revealed the formation of an infinite, all-planar ladder structure. Compound 2 crystallizes from n-hexane at - 35°C in the orthorhombic space group Pnma with a = 5.4439(2) Å, b = 15.7268(9) Å, c = 10.9751(6) Å, V = 939.63(8) Å3 and Z = 4. Least squares refinement of the model based on 873 reflections converged to a final ωR2 = 0.1124.

Original languageEnglish (US)
Pages (from-to)1195-1201
Number of pages7
JournalPolyhedron
Volume17
Issue number7
DOIs
StatePublished - Jan 1 1998

Keywords

  • Alkali metal
  • Bis(dimethylsilyl) amide
  • Laddering
  • Sodium
  • X-ray structure

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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