Diaqua-dichlorido[5-(3-pyridinio)tetra-zolato-κN]copper(II) dihydrate.

The title compound, [CuCl(2)(C(6)H(5)N(5))(2)(H(2)O)(2)]·2H(2)O, was synthesized by hydro-thermal reaction of CuCl(2) with 3-(2H-tetra-zol-5-yl)pyridine. The Cu(II) cation, located on an inversion center, is coordinated by two Cl(-) ions, two N atoms from two 5-(3-pyridinio)tetra-zolate zwitterions and two O atoms from two water mol-ecules in a distorted octa-hedral geometry. In the crystal, mol-ecules are linked into a two-dimensional sheet parallel to (001) by N-H⋯N, O-H⋯N, O-H⋯O and O-H⋯Cl hydrogen bonds involving the pyridinium N atom, the Cl atoms and the coordinated and free water mol-ecules. The latter are disordered over two positions in a 0.54:0.46 ratio.