Tetraaquabis[5-(3-pyridyl) tetrazolidoκN5]zinc(II) tetrahydrate

The title compound, [Zn(C6H4N5)(2)(H2O)(4)]center dot 4H(2)O, was synthesized by the hydrothermal reaction of Zn(CH3COO)(2)center dot 2H(2)O with 3-(2H-tetrazol-5-yl) pyridine. The Zn-II ion is located on an inversion center and is coordinated by two pyridine N atoms from two 5-(3-pyridyl) tetrazolide ligands and four coordinated water molecules in a slightly distorted octahedral geometry. The dihedral angle between the pyridine and tetrazole rings is 9.920 (7)degrees. In the crystal, molecules are linked into a three-dimensional network by intermolecular O-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen bonds involving the tetrazole group N atoms, the aqua ligands and solvent water molecules.