Synthesis and characterisation of stable carbene-indium(III) halide complexes

Steven J. Black, David E. Hibbs, Michael B. Hursthouse, Cameron Jones, K. M.Abdul Makik, Neil A. Smithies

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The reaction of the stable carbene, :CN(Pri)C2Me2NPri, with InX3, X = Cl or Br, yielded either the 1:1 or 1:2 complexes, [InX3{CN(Pri)C2Me2NPri}] and [InX3{CN(Pri)C2Me2NPr i}2], depending upon the stoichiometry employed. X-Ray crystallography showed one of the 1:1 adducts, X = Br, to be monomeric and tetrahedral. The 2:1 adducts have a trigonal-bipyramidal geometry with two halides axial and one equatorial. Conductivity and NMR studies suggested all these complexes retain their neutrality in solution. Treatment of InX3 with I equivalent of CN(Pri)C2Me2NPri and half an equivalent of water afforded the ionic compounds [HCN(Pri)C2Me2NPri] [InX4{CN(Pri)C2Me2NPri}] which are fluxional in solution at room temperature. The crystal structures of both compounds show the anion to be trigonal bipyramidal with two axial and two equatorial halides.

Original languageEnglish
Pages (from-to)4313-4319
Number of pages7
Issue number22
Publication statusPublished - 21 Nov 1997
Externally publishedYes

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