Copper-chalcogenide clusters stabilised with linear bidentate phosphine ligands

摘要

The bidentate phosphine ligands bis(diphenylphosphino)acetylene and 1,4-bis(diphenylphosphino)benzene have been found effectively to stabilise polynuclear copper/chalcogenide/chalcogenolate cores, acting as intramolecular bridges between copper centres. The clusters [Cu16Se4(SePh)(8)(mu-1,4-Ph2PC6H4PPh2)(4)] 1 and [Cu25Te6(TeBun)(13)(mu-Ph2PC=CPPh2)(6)] 2 and the related binuclear complexes [((BuTe)-Te-n)Cu(mu-Ph2PC=CPPh2)(3)Cu(TeBun)] 3 and [(PhSe)-Cu(mu-Ph2PC=CC=CPPh2)(3)Cu(SePh)] 4 have been prepared and their molecular structures determined. [References: 66]