A novel mixed-valence copper complex, poly[[μ₂-4,4′-bipyridine-μ₃-pyridine-2,4,6-tricarboxyl­ato-di­copper(I,II)] monohydrate]

In the title novel mixed-valence copper complex, {[Cu₂(C₈H₂NO₆)(C₁₀H₈N₂)]·H₂O}_n, the Cu^I and Cu^II ions are linked by 4,4′-bipyridine (bpy) and pyridine-2,4,6-tricarboxyl­ate (ptc) ligands into corrugated layers, which are assembled via inter­layer C—H...O hydrogen bonds to give a three-dimensional supra­molecular architecture.