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Issue 44, 2010
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Stabilisation of iridium(III) fluoride complexes with NHCs

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Abstract

The first neutral, [IrClF2(NHC)(COD)] and [IrClF2(CO)2(NHC)] (NHC = IMes, IPr), and cationic, [IrF2py(IMes)(COD)][BF4] and [IrF2L(CO)2(NHC)][BF4] (NHC = IMes, L = PPh2Et, PPh2CCPh, py; NHC = IPr, L = py), NHC iridium(III) fluoride complexes, have been synthesised by the xenon difluoride oxidation of iridium(I) substrates. The stereochemistries of these iridium(III) complexes have been confirmed by multinuclear NMR spectroscopy in solution and no examples of fluoride-trans-NHC arrangements were observed. Throughout, CO was found to be a better co-ligand for the stabilisation of the iridium(III) fluoride complexes than COD. Attempts to generate neutral trifluoroiridium(III) complexes, [IrF3(CO)(NHC)], via the ligand substitution reaction of [IrF3(CO)3] with the free NHCs were unsuccessful.

Graphical abstract: Stabilisation of iridium(iii) fluoride complexes with NHCs

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Publication details

The article was received on 16 Jul 2010, accepted on 03 Sep 2010 and first published on 13 Oct 2010


Article type: Paper
DOI: 10.1039/C0DT00857E
Citation: Dalton Trans., 2010,39, 10781-10789
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    Stabilisation of iridium(III) fluoride complexes with NHCs

    J. Fawcett, D. A. J. Harding, E. G. Hope, K. Singh and G. A. Solan, Dalton Trans., 2010, 39, 10781
    DOI: 10.1039/C0DT00857E

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