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Issue 22, 1997
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Synthesis and characterisation of stable carbene–indium(III) halide complexes

Abstract

The reaction of the stable carbene, >:>[upper bond 1 start]CN(Pri)C2Me2 [upper bond 1 end]NPri, with InX3, X = Cl or Br, yielded either the 1∶1 or 1∶2 complexes, [InX3{[upper bond 1 start]CN(Pri)C2Me2N[upper bond 1 end]Pri}] and [InX3{[upper bond 1 start]CN(Pri)C2Me2N[upper bond 1 end]Pri}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 1 equivalent of [upper bond 1 start]CN(Pri)C2Me2N[upper bond 1 end]Pri and half an equivalent of water afforded the ionic compounds [H[upper bond 1 start]CN(Pri)C2Me2N[upper bond 1 end]Pri] [InX4{[upper bond 1 start]CN(Pri)C2Me2N[upper bond 1 end]Pri}] 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.

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Article information


J. Chem. Soc., Dalton Trans., 1997, 4313-4320
Article type
Paper

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

S. J. Black, D. E. Hibbs, M. B. Hursthouse, C. Jones, K. M. Abdul Malik and N. A. Smithies, J. Chem. Soc., Dalton Trans., 1997, 4313
DOI: 10.1039/A705358D

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