Synthesis and reactivity of N-heterocyclic carbene (NHC) gold-fluoroalkoxide complexes.

We disclose a novel series of N-heterocyclic carbene (NHC) gold complexes with varied steric and electronic properties, bearing fluorinated alkoxide anions. Early reactivity studies involving these synthons, lead to the synthesis of various complexes of relevance to gold chemistry and catalysis.

An air-stable [Cu(NHC)(OR)] (R = C(H)(CF3)2) complex for C-H, N-H and S-H bond activation.

The synthesis, isolation and full characterisation of a [Cu(IPr)(OC(H)(CF3)2)] (IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) complex are reported. This new Cu(I) complex is a versatile synthon and can activate numerous X-H bonds including C-H, N-H and S-H bonds. [Cu(IPr)(OC(H)(CF3)2)] was investigated as a pre-catalyst in several catalytic reactions.