Hydrothermal synthesis and structural characterization:: a novel α-Keggin unit supported zinc-bipyridyl complex [Zn(2,2′-bipy)3]2[ZnW12O40Zn(2,2′-bipy)2] • H2O

The hydrothermal reaction of Na2WO4.2H(2)O, ZnCl2, Zn(AC)(2).2HO(2) 2,2'-bipyridine, and H2O gives rise to a novel Keggin unit supported zinc-bipyridyl complex [Zn(2,2'-bipy)(3)](2)[ZnW12O40Zn(2,2'-bipy)(2)].H2O consisting of a novel heteropolyanion [ZnW12O40Zn(2,2'-bipy)(2)](4+) in which the Keggin anion [ZnW12O40](6-) acts as a bidentate ligand towards the transition metal cation Zn2+ through a terminal oxygen and a bridging oxygen from the same WO6 octahedron. (C) 2003 Elsevier B.V. All rights reserved.