catena-Poly[[[aquabis(1H-imidazole-κN3)copper(II)]-μ-naphthalene-1,4-dicarboxylato-κ2O1:O4] dihydrate]

In the title compound, {[Cu(C12H6O4)(C3H4N2)2(H2O)]·2H2O}n, the CuII cation is coordinated by two naphthalene-1,4-dicarboxylate (naph) dianions, two imidazole molecules and one water molecule in a distorted square-pyramidal geometry. The Cu—O bond distance in the apical direction is 0.509 (3) Å longer than the mean Cu—O bond distance in the basal plane. The naph dianion bridges two CuII cations, forming a one-dimensional polymeric chain. The coordinated water molecule is hydrogen-bonded to the carboxylate groups and imidazole ligands of adjacent polymeric chains, forming a three-dimensional supramolecular structure. No À–À stacking is observed in the crystal structure. One solvent water molecule is disordered equally over two positions.