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Issue 12, 2008
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A new series of dinuclear Au(I) complexes linked by diethynylpyridine groups

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A series of novel digold complexes incorporating ethynyl pyridine derivatives as a spacer unit, [(R3P)Au(C[triple bond, length as m-dash]C)X(C[triple bond, length as m-dash]C)Au(PR3)] (R = Ph, X = 2,5-pyridine (1); R = Cy (cyclohexane), X = 2,5-pyridine (2); R = Ph, X = 2,6-pyridine (3); R = Ph, X = 2,5′-bipyridine (4); R = Ph, X = 2,6′-bipyridine (5)), has been synthesised. All the complexes have been characterised spectroscopically and the structures determined by single-crystal X-ray crystallography. The central (C[triple bond, length as m-dash]C)(X)(C[triple bond, length as m-dash]C) unit is essentially linear for complexes 1, 2 and 4 and kinked for complexes 3 and 5, but only in 1, with the shortest spacer group and the less bulky phosphine ligand, is there evidence of d10⋯d10Au⋯Au interactions (Au–Au 3.351(2) Å). The solution UV/visible absorption and emission spectra for all the complexes are similar to those of the free ligands suggesting that the spectra are dominated by π–π* ligand-centred transitions and this is confirmed by DFT calculations.

Graphical abstract: A new series of dinuclear Au(i) complexes linked by diethynylpyridine groups

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Publication details

The article was received on 30 Oct 2007, accepted on 18 Dec 2007 and first published on 24 Jan 2008

Article type: Paper
DOI: 10.1039/B716664H
Citation: Dalton Trans., 2008,0, 1635-1646
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    A new series of dinuclear Au(I) complexes linked by diethynylpyridine groups

    P. Li, B. Ahrens, A. D. Bond, J. E. Davies, O. F. Koentjoro, P. R. Raithby and S. J. Teat, Dalton Trans., 2008, 0, 1635
    DOI: 10.1039/B716664H

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