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

Lookup NU author(s): Emeritus Professor Bill Clegg, Dr Ross Harrington

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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-[Pt-2(mu-2)(dmso)(2)Cl-4] and cis-[Pt-2(mu-4)(dmso)(2)Cl-4] 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 H-1, C-13, N-15 and Pt-195 NMR spectra of the platinum complexes show the presence of rotamers due to hindered rotation about the carbene-metal bond.


Publication metadata

Author(s): Marshall P, Jenkins RL, Clegg W, Harrington RW, Callear SK, Coles SJ, Fallis IA, Dervisi A

Publication type: Article

Publication status: Published

Journal: Dalton Transactions

Year: 2012

Volume: 41

Issue: 41

Pages: 12839-12846

Print publication date: 07/09/2012

ISSN (print): 1477-9226

ISSN (electronic): 1477-9234

Publisher: Royal Society of Chemistry

URL: http://dx.doi.org/10.1039/c2dt31740k

DOI: 10.1039/c2dt31740k


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