Trialkylphosphine-stabilized copper(I) phenylchalcogenolate complexes--crystal structures and copper-chalcogenolate bonding |
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Authors: | Kluge Oliver Grummt Katharina Biedermann Ralf Krautscheid Harald |
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Institution: | Institut fu?r Anorganische Chemie, Universita?t Leipzig, Johannisallee 29, 04103 Leipzig, Germany. |
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Abstract: | A series of trialkylphosphine-stabilized copper(I) phenylchalcogenolate complexes (R(3)P)(m)(CuEPh)(n)] (R = Me, Et, (i)Pr, (t)Bu; E = S, Se, Te) has been prepared and structurally characterized by X-ray diffraction. Structures were found to be mono-, di-, tri-, tetra-, hexa-, hepta-, or decanuclear, depending mainly on size and amount of phosphine ligand. Several structural details were observed, including unusually long Cu-E bonds or secondary Cu-E connections, μ(4)-bridging, and planar bridging chalcogenolate ligands. Relatively rigid Cu-E-C angles were found to be of significant influence on the flexible molecular structures, especially for bridging chalcogenolate ligands, since in these cases a correlation results between the Cu-E-Cu angles and the inclination of the E-C bonds to their Cu-E-Cu planes. We further address some of these phenomena by means of density functional computations. |
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