Experimental Crystal data

R factor = 0.036; wR factor = 0.078; data-to-parameter ratio = 11.1. The NiII atom in the title compound, [Ni(C12H8N5)2(H2O)4]-2H2O, lies on a center of inversion and is coordinated by the N atoms of two 3,5-di-4-pyridine-1,2,4-triazolate ligands and by four water O atoms in a slightly distorted octahedral geometry. The coordinated and uncoordinated water molecules interact with the N-heterocycles through O—H N and O—H O hydrogen bonds, generating a three-dimensional supra-molecular architecture. Related literature For magnetic studies of transition metal complexes with 1,2,4