Synthesis and Structural Characterization of Silver(I) Complexes with α-Dithionaphthoato Ligands

Abstract

Interaction of [(α-C10H7CS2)Ag]n and two equivalents PPh3 afforded a mononuclear silver(I) complex [Ag(α-C10H7CS2)(PPh3)2] (1), while reaction of [(α-C10H7CS2)Ag]n and equal equivalent bidentate phosphorus ligand 1,4-bis(diphenylphosphino)butane (dppb) gave a polymeric complex [Ag(α-C10H7CS2)dppb]n with a one-dimensional chain (2). Treatment of [(α-C10H7CS2)Ag]n with 3,5-dimethylpyridine (3,5-Me2Py) gave a tetra-nuclear silver(I) complex [Ag4(α-C10H7CS2)4(3,5-Me2py)4] (3) with a tetrahedral Ag4 core. Moreover, reaction of AgBr or AgCl with half equivalent (Et4N)(α-C10H7CS2) in dimethylformamide resulted in isolation of a tetra-nuclear anionic silver(I) complex (Et4N)2[Ag4(α-C10H7CS2)6] (4) with a square Ag4 core. The structures of four silver(I) complexes 1–4 were established by X-ray crystallography. The luminescence properties of the silver(I) dithionaphthoate complexes were also investigated. A series of mono-, tetra-, and poly-nuclear new silver complexes were efficiently synthesized via the reaction of phosphorus ligand (PPh3/dppb) or nitrogen ligand (3,5-Me2py) with [(α-C10H7CS2)Ag]n, in which the α-dithionaphthoato ligands adopt four different coordination modes. The structures of complexes 1–4 were characterized by X-ray crystallography.