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DOI: 10.1039/A603312A (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1997, 439-442

Unprecedented co-ordination mode of the tetrathio-molybdate or -tungstate anions in heterometallic gold complexes. Crystal structures of [MoS4(AuAsPh3)2] and [WS4(AuCH2PPh3)2]·CH 2Cl2

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Fernando Canales, M. Concepción Gimeno, Peter G. Jones and Antonio Laguna

Abstract

Treatment of the tetrathiometalates [NH4]2[MS4] (M = Mo or W) with [AuCl(AsPh3)] (molar ratio 1∶2) gave the trinuclear species [MS4(AuAsPh3)2] (M = Mo 1 or W 2). Stepwise substitution of the arsine ligand afforded the complexes [MS4(AuAsPh3)(AuPPh3)] (M = Mo 3 or W 4) or [MS4(AuPPh3)(AuPPh2Me)] (M = Mo 5 or W 6). The reaction with gold(I) complexes [AuCl(ylide)] follows a different pathway depending on the ylide ligand; with the less sterically demanding CH2PPh2Me the species [MS4(AuCH2PPh2Me)2] (M = Mo 7 or W 8) with three-co-ordinate gold were formed, but the ylide CH2PPh3 led to [MS4(AuCH2PPh3)2] (M = Mo 9 or W 10) with one three- and one two-co-ordinate gold centre. The crystal structures of complexes 1 and 10 were determined by X-ray diffraction.

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