Poly[diaqua-1κO-bis[μ(3)-2-(1H-tetra-zol-5-yl)benzoato(2-)]dicadmium(II)].

The title compound, [Cd(2)(C(8)H(4)N(4)O(2))(2)(H(2)O)(2)](n), is a coordination polymer prepared by the hydro-thermal reaction of cadmium(II) chloride and 2-(1H-tetra-zol-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 octa-hedrally coordinated by two N and two O atoms from two ligands in equatorial sites, and two water mol-ecules in axial sites. The organic ligand bridges three Cd atoms, through a carboxyl-ate group and two N atoms of the tetra-zolate unit. This mode of coordination results in a two-dimensional framework. The crystal structure is stabilized by inter-molecular O-H⋯O and O-H⋯N hydrogen bonds.