Electrochemical synthesis of copper and silver pyridine-2-selenolato complexes: crystal structure of (6-trimethylsilylpyridine-2-selenolato)silver(I), [Ag-6(6-Me(3)SipySe)(6)]

(Pyridine-2-selenolato-Se, N)copper(I) and silver(I) [Cu(pySe)] and [Ag(pyS e)] and (6-trimethylsilylpyridine-2-selenolato-Se, N)copper(I) and silver(I ), [Cu(6-Me(3)SipySe)] and [Ag-6(6-Me(3)SipySe)(6)], were obtained by elect rochemical oxidation of metals in an acetonitrile solution of the correspon ding dimer diselenide ligands. The crystal structure of (6-trimethylsilylpy ridine-2-selenolato)silver(I) has been determined by X-ray diffraction. The [Ag-6(6-Me(3)SipySe)(6)] compound is an hexamer with the six silver atoms arranged in a distorted octahedral geometry; each silver atom is trigonally coordinated to one nitrogen and two selenium atoms of three different liga nds. Crystal data: triclinic, P-1, a = 9.700(2), b = 14.441(3), c = 14.495( 3) Angstrom, alpha = 109.25(3), beta = 104.97(3), gamma = 101.34(3)degrees, V = 1761.2(6) Angstrom(3), Z = 6, D-calc = 1.907 g cm(-3), R = 0.0305 for 2729 reflections. (C) 1999 Elsevier Science S.A. All rights reserved.