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Issue 41, 2012
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Chiral Ag(i) and Pt(ii) complexes of ditopic NHC ligands: synthesis, structural and spectroscopic properties

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Abstract

The butyl and isopropyl derivatives (4I, 5Br) of chiral pool derived bis-imidazolium dehydrohexitol salts have been prepared. The ditopic N-heterocyclic carbenes 4 and 5 form dinuclear Ag(I) and Pt(II) complexes. All compounds were fully characterised by multinuclear NMR spectroscopy. The bis-imidazolium salt 4I and platinum complexes cis-[Pt2(μ-2)(dmso)2Cl4] and cis-[Pt2(μ-4)(dmso)2Cl4] were characterised by X-ray crystallography. In the case of the Pt(II) complexes, the carbene ring is positioned in a sterically preferred orientation, approximately perpendicular to the platinum coordination plane. The 1H, 13C, 15N and 195Pt NMR spectra of the platinum complexes show the presence of rotamers due to hindered rotation about the carbene–metal bond.

Graphical abstract: Chiral Ag(i) and Pt(ii) complexes of ditopic NHC ligands: synthesis, structural and spectroscopic properties

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Publication details

The article was received on 31 Jul 2012, accepted on 06 Sep 2012 and first published on 07 Sep 2012


Article type: Paper
DOI: 10.1039/C2DT31740K
Dalton Trans., 2012,41, 12839-12846
  • Open access: Creative Commons BY license
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    Chiral Ag(I) and Pt(II) complexes of ditopic NHC ligands: synthesis, structural and spectroscopic properties

    P. Marshall, R. L. Jenkins, W. Clegg, R. W. Harrington, S. K. Callear, S. J. Coles, I. A. Fallis and A. Dervisi, Dalton Trans., 2012, 41, 12839
    DOI: 10.1039/C2DT31740K

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