Diaquabis[5-(2-pyridyl)-1H-tetrazolato-κ2N1,N5]cobalt(II)

In the title compound, [Co(C6H4N5)(2)(H2O)(2)], the Co atom is bonded to two water molecules and two bidentate 5-(2-pyridyl) tetrazolate ligands resulting in a slightly distorted octahedral CoN4O2 coordination geometry. The Co-II cation is situated on a crystallographic center of inversion. The asymmetric unit therefore comprises one- half of the molecule. The four N atoms belonging to two bidentate 5-(2-pyridyl) tetrazolate ligands lie in the equatorial plane and the two associated water molecules are observed in the axial coordination sites. The crystal structure exhibits a threedimensional supramolecular network assembled by intermolecular O-H center dot center dot center dot N hydrogen bonds.