Organogold(III) Complexes with Chelating Thiourea-Type Ligands

The gold(III) starting material [Au(damp-κC1,N)Cl2] (Hdamp = 2-(dimethylaminomethyl)benzene) reacts with the thiourea-type ligands 3,3-diethyl-1-benzoylthiourea (HL1) or N-(3,3-diethylamino-thiocarbonyl)-N′-(2-hydroxyphenyl)benzamidine (H2L2) under formation of the gold(III) cations [Au(damp-κC1,N)(L1-κS,O)]+ (1) and [Au(Hdamp-κC1)(L2-κS,N,O)]+ (2). The products have been isolated in crystalline form as their PF6− salts and studied by X-ray diffraction and spectroscopic methods. The preservation of the gold(III) oxidation state and the square-planar coordination spheres in the products is most probably due to the formation of chelate rings by the incoming ligands and the presence of the Au–C bond to the phenyl rings of the damp− or Hdamp ligands.