Aqua(2,2′-bipyridyl)(pyrazine-2,6-dicarboxylato)nickel(II) 1.25-hydrate

The asymmetric unit of the title compound, [Ni(C6H2N2O4)(C10H8N2)(H2O)]·1.25H2O, contains two independent chemically identical NiII complex cations and two and a half solvent water molecules. The NiII ions are in slightly distorted coordination environments. In the crystal structure, intermolecular O—H...O and weak C—H...O hydrogen bonds link cations and water molecules into a three-dimensional network. One of the three uncoordinated water molecules is half-occupied.