SYNTHESIS AND STRUCTURE OF AG-4[(PHN(3))( 2)C6H4](2)(EN)(2), A TETRANUCLEAR SILVER(I) COMPLEX WITH 1,2-BIS(PHENYLTRIAZENIDO)BENZENE AS LIGAND

Ag-4[(PhN(3))(2)C6H4](2)(en)(2) is obtained by the reaction of [Ag(NH3 )(2)](+) with 1,2-bis(phenyltriazeno)benzene and ethylenediamine. It c rystallizes in the monoclinic space group P2(1)/c with a = 1064.9(2), b = 2041.8(3), c = 1008.5(3) pm, beta = 101.37(2)degrees, Z = 2. In th e centrosymmetrical tetranuclear complex, the four Ag+ ions form a zig zag chain with Ag-Ag distances of 293.34 and 280.42 pm. Ethylenediamin e molecules chelate the two terminal Ag atoms of this chain. Each of t he 1,2-bis(phenyltriazeno)benzene ligands in the deprotonated bis(tria zenido) form [(PhN(3))(2)C6H4](2-) is bridging three Ag+ ions. The Ag ions are coordinated by three N atoms in a trigonal planar arrangemen t with Ag-N distances between 214.0 and 241.2 pm.