Bis(μ-3-chlorobenzene-1,2-dicarboxylato-κ2O2:O2)bis[diaqua(5,5′-dimethyl-2,2′-bipyridine-κ2N,N′)copper(II)]

In the centrosymmetric binuclear title compound, [Cu-2(C8H3ClO4)(2)(C12H12N2)(2)(H2O)(4)], the Cu-II ion is six-coordinated by two N atoms from a 5,5'-dimethyl-2,2'-bipyridine ligand, two bridging O atoms from two 3-chlorobenzene-1,2-dicarboxylate ligands and two water molecules in a distorted octahedral geometry. The binuclear complex molecules are linked together by intermolecular O-H center dot center dot center dot O hydrogen bonds into a layer parallel to (100). The layers are connected by C-H center dot center dot center dot Cl hydrogen bonds. Intramolecular O-H center dot center dot center dot O hydrogen bonds and pi-pi interactions [centroid-centroid distance = 3.5958 (16) angstrom] are also present.