Poly[bis(2,2′-bipyridine-κ2N,N′)heptadeca-μ-oxido-tetraoxidodicopper(II)divanadate(IV)hexavanadate(V)]

Abstract

In the title complex, [Cu2V8O21(2,2′-bpy)2]n (bpy = bipyridine, C10H8N2), the asymmetric unit contains four independent V atoms briged by 11 O atoms, one of which lies on an inversion center, and a [Cu(2,2′-bpy)]2+ unit. Three V atoms in the polyoxoanion exhibit distorted tetrahedral coordination geometries while the fourth V atom adopts a trigonal-bipyramidal geometry. The Cu atom adopts a square-pyramidal geometry being coordinated by two nitrogen donors of a 2,2′-bpy ligand, and three bridging O atoms which are linked with V atoms. The V8 polyoxoanion is connected to [Cu(2,2′-bpy)]2+ cations, resulting in a two-dimensional layer structure extending parallel to (010). C—H...O hydrogen bonding consolidates the structure.