Gold and silver complexes with the diselenium ligand [Ph 2P(Se)NP(Se)Ph 2] −

Abstract

The treatment of potassium diselenoimidodiphosphinato with silver(I) or gold(III) derivatives leads to the synthesis of three-coordinated, [Ag{(SePPh 2) 2N}(PPh 3)], tetranuclear, [Ag 4{(SePPh 2) 2N} 3]OTf ( 4) (OTf=OSO 2CF 3), or square-planar, [Au(C 6F 5) 2{(SePPh 2) 2N}] ( 5), complexes. The crystal structures of [Au 2{(SePPh 2) 2N}(PPh 3) 2]OTf ( 2), 4 and 5 have been established by X-ray diffraction. Complex 2 is associated by gold–gold interactions forming tetranuclear dimers. In complex 4 four silver atoms forming a distorted tetrahedron are bridged by three ligands, and 5 shows the expected square-planar coordination at gold.