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Chiral Ag(I) and Pt(II) complexes of ditopic NHC ligands: synthesis, structural and spectroscopic properties

Marshall, Paul, Jenkins, Robert Leyshon, Clegg, W., Harrington, R. W., Callear, S. K., Coles, S. J., Fallis, Ian Andrew and Dervisi, Athanasia 2012. Chiral Ag(I) and Pt(II) complexes of ditopic NHC ligands: synthesis, structural and spectroscopic properties. Dalton Transactions 2012 (41) , pp. 12839-12846. 10.1039/C2DT31740K

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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Publisher: RSC Publishing
ISSN: 1477-9226
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 04:34
URI: http://orca.cf.ac.uk/id/eprint/41310

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