catena-Poly[[[dipyridinecopper(II)]-μ-2,3,5,6-tetramethylbenzene-1,4-dicarboxylato] monohydrate]

In the title complex, {[Cu(C12H12O4)(C5H5N)2]·H2O}n, the CuII ion lies on an inversion center and is coordinated by two O atoms from two 2,3,5,6-tetramethylbenzene-1,4-dicarboxylate (TBDC) ligands and two N atoms from two pyridine ligands in a slightly distorted square-planar environment. The TBDC ligands act as bridging ligands, forming chains along [110]. These chains are further linked into a two-dimensional network via intermolecular O—H...O hydrogen bonds. The solvent water molecule lies on a twofold rotation axis.