Jump to main content
Jump to site search

Issue 7, 2004
Previous Article Next Article

Dinuclear gold(I) complexes of bridging bidentate carbene ligands: synthesis, structure and spectroscopic characterisation

Author affiliations

Abstract

Eight dinuclear Au(I)-carbene complexes have been synthesized from various imidazolium-linked cyclophanes and related acyclic bis(imidazolium) salts, by treatment of the imidazolium salts with [Au(I)(SMe2)Cl] in the presence of a carboxylate base. Single crystal structural studies showed that the Au(I)-carbene compounds contain dinuclear (AuL)2 cations in which a pair of gold(I) centres are linked by a pair of bridging dicarbenoid ligands. Interestingly, the structural studies revealed short Au⋯Au contacts of 3.0485(3) Å and 3.5425(6) Å in two of these complexes. NMR studies showed that the (AuL)2 cations constructed from the cyclophane-based ligands retain a relatively rigid structure in solution, whilst those of the non-cyclophane ligand systems are fluxional in solution. The electronic absorption and emission spectra of the complexes in solution at room temperature were recorded and the complex with the shortest Au⋯Au contact was found to emit intensely at 400 nm and more weakly at 780 nm upon excitation at 260 nm. The compounds with longer Au⋯Au separations were not emissive under these conditions.

Graphical abstract: Dinuclear gold(i) complexes of bridging bidentate carbene ligands: synthesis, structure and spectroscopic characterisation

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Dec 2003, accepted on 09 Feb 2004 and first published on 02 Mar 2004


Article type: Paper
DOI: 10.1039/B316804B
Citation: Dalton Trans., 2004,0, 1038-1047
  •   Request permissions

    Dinuclear gold(I) complexes of bridging bidentate carbene ligands: synthesis, structure and spectroscopic characterisation

    P. J. Barnard, M. V. Baker, S. J. Berners-Price, B. W. Skelton and A. H. White, Dalton Trans., 2004, 0, 1038
    DOI: 10.1039/B316804B

Search articles by author

Spotlight

Advertisements