title: Stable -ESiMe3 Complexes of Cu(I) and Ag(I) (E=S, Se) with NHCs: Synthons in Ternary Nanocluster Assembly.
abstract: As a part of efforts to prepare new "metallachalcogenolate" precursors and develop their chemistry for the formation of ternary mixed-metal chalcogenide nanoclusters, two sets of thermally stable, N-heterocyclic carbene metal-chalcogenolate complexes of the general formula [(IPr)Ag-ESiMe3] (IPr=1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene; E=S, 1; Se, 2) and [(iPr2-bimy)Cu-ESiMe3]2 (iPr2-bimy=1,3-diisopropylbenzimidazolin-2-ylidene; E=S, 4; Se, 5) are reported. These are prepared from the reaction between the corresponding carbene metal acetate, [(IPr)AgOAc] and [(iPr-bimy)CuOAc] respectively, and E(SiMe3 )2 at low temperature. The reaction of [(IPr)Ag-ESiMe3] 1 with mercury(II) acetate affords the heterometallic complex [{(IPr)AgS}2Hg] 3 containing two (IPr)Ag-S(-) fragments bonded to a central Hg(II), representing a mixed mercury-silver sulfide complex. The reaction of [(iPr2-bimy)Cu-SSiMe3]2, which contains a smaller N-heterocyclic-carbene, with mercuric(II) acetate affords the high nuclearity cluster, [(iPr2-bimy)6Cu10S8Hg3]6. The new N-heterocyclic carbene metal-chalcogenolate complexes 1, 2, 4, 5 and the ternary mixed-metal chalcogenolate complex 3 and cluster 6 have been characterized by multinuclear NMR spectroscopy ((1)H and (13)C), elemental analysis and single-crystal X-ray diffraction.
authors: Department of Chemistry, The University of Western Ontario, London, ON, N6A 5B7, Canada.
authors: Mahmood
authors: M
authors: Azizpoor Fard
authors: Department of Chemistry, The University of Western Ontario, London, ON, N6A 5B7, Canada.
authors: Tetyana I
authors: TI
authors: Levchenko
authors: Department of Physics and Astronomy, The University of Western Ontario, London, ON, N6A 5B7, Canada.
authors: Carolyn
authors: C
authors: Cadogan
authors: Department of Chemistry, The University of Western Ontario, London, ON, N6A 5B7, Canada.
authors: William J
authors: WJ
authors: Humenny
authors: Department of Chemistry, The University of Western Ontario, London, ON, N6A 5B7, Canada. corrigan@uwo.ca.|Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, ON, N6A 5B7, Canada. corrigan@uwo.ca.
authors: John F
authors: JF
authors: Corrigan
keywords: N-heterocyclic carbenes; chalcogens; clusters; copper; silver