catena-Poly[[[triaquacopper(II)]-μ-2,2′-bipyridine-3,3′-dicarboxylato-κ3N,N′:O] monohydrate]

The title compound, {[Cu(C12H6N2O4)(H2O)3]·H2O}n, was synthesized under hydrothermal conditions. The Cu2+ ion is six-coordinated by three water O atoms, and two N atoms and one O atom of the 2,2′-bipyridine-3,3′-dicarboxylate bridging ligand in a sligthly distorted octahedral environment. The 2,2-bipyridine-3,3′-dicarboxylate bridges link the Cu2+ ions into chains along the b-axis direction. These chains are further linked by O—H...O hydrogen bonds involving the water solvent molecules, forming a three-dimensional framework