Poly[diaqua-1κ2O-bis[μ3-2-(1H-tetrazol-5-yl)benzoato(2−)]dicadmium(II)]

The title compound, [Cd2(C8H4N4O2)2(H2O)2]n, is a coordination polymer prepared by the hydrothermal reaction of cadmium(II) chloride and 2-(1H-tetrazol-5-yl)benzoic acid. Two types of coordinated cadmium cations exist in the structure. One is located on a twofold axis and is coordinated by four O and two N atoms from four symmetry-related ligands, forming a trigonal-prismatic coordination polyhedron. The other is located on an inversion center and is octahedrally coordinated by two N and two O atoms from two ligands in equatorial sites, and two water molecules in axial sites. The organic ligand bridges three Cd atoms, through a carboxylate group and two N atoms of the tetrazolate unit. This mode of coordination results in a two-dimensional framework. The crystal structure is stabilized by intermolecular O—H...O and O—H...N hydrogen bonds