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American Chemical Society, Organometallics, 14(26), p. 3424-3430, 2007

DOI: 10.1021/om700345m

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Group 9 and 11 Metal(I) Gallyl Complexes Stabilized by N-Heterocyclic Carbene Coordination: First Structural Characterization of Ga-M (M = Cu or Ag) Bonds

Journal article published in 2007 by Shaun P. Green, Cameron Jones, David P. Mills ORCID, Andreas Stasch ORCID
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

Reactions of the anionic gallium(I) heterocycle [:Ga{[N(Ar)C(H)]2}]- (Ar = C6H3Pri2-2,6) with a variety of N-heterocyclic carbene (NHC) complexes of group 9 and 11 halides are reported. In all cases, salt elimination occurs, yielding the neutral metal gallyl complexes [M(COD)(IMes){Ga{[N(Ar)C(H)]2}}] (M = Rh or Ir; COD = 1,5-cyclooctadiene; IMes = :C{N(C6H2Me3-2,4,6)CH}2) or [(NHC)M{Ga{[N(Ar)C(H)]2}}] (M = Cu, Ag, or Au; NHC = IMes, IPr (:C{N(Ar)C(H)}2), or ICy (:C{N(C6H11)C(Me)}2)). NHC coordination apparently stabilizes the formed complexes toward elimination processes that have been observed in previous studies. The majority of the complexes in this study have been the subjects of X-ray crystallographic studies, which in several cases reveal the first examples of Ga?Cu or Ga?Ag bonds in molecular complexes. Analogies between the gallium heterocycle and cyclic boryl ligands are explored. Solid-state and spectroscopic studies on the prepared complexes suggest that the gallyl ligand has a trans influence intermediate between cyclic boryls and chloride. ; doi: 10.1021/om700345m