Tetraaquabis[4-(tetrazol-1-yl)benzoatoκN4]nickel(II) dihydrate.

In the title compound, [Ni(C8H5N4O2)2(H2O)4]·2H2O, the NiII ion lies on an inversion centre and is coordinated by two N atoms from two 4-(tetrazol-1-yl)benzoate ligands and four O atoms from four water molecules in a slightly distorted octahedral geometry. In addition, there are two uncoordinated water molecules in the structure. The crystal structure is stabilized by intermolecular O—H⋯O hydrogen bonds. [ABSTRACT FROM AUTHOR]