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Preparation and structures of{Li[C(N tBu) 2(HN tBu)]} 2·(THF)and{Li 2[C(N tBu) 3]} 2, containing the novel anions[C(N tBu) 2(HN tBu)] −and[C(N tBu) 3] 2− 1 Dedicated to Professor Ken Wade on the occasion of his 65th birthday and in recognition of his many contributions to inorganic chemistry, including the `laddering principle' in lithium amide chemistry [1].1

Authors
Journal
Journal of Organometallic Chemistry
0022-328X
Publisher
Elsevier
Publication Date
Volume
550
Identifiers
DOI: 10.1016/s0022-328x(97)00182-4
Keywords
  • Hetero-Trimethylenemethane Ligands
  • C–N–Li Cluster
  • Carbodiimides
  • X-Ray Structure

Abstract

Abstract The reaction of tert-butyl carbodiimide with one equivalent of LiNH tBu in tetrahydrofuran at −78 °C produces {Li[C(N tBu) 2(HN tBu)]} 2·(THF) ( 1), which is an eight-membered Li 2C 2N 4 ring; the deprotonation of 1 with two equivalents of n-BuLi in tetrahydrofuran at −78 °C and recrystallization of the product from n-pentane yielded the unsolvated dimer {Li 2[C(N tBu) 3]} 2 ( 2), which has a distorted cyclic ladder structure.

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