catena-Poly[[(pyridine-κN)copper(II)]-μ(3)-pyridine-2,6-dicarboxylato-κ(3) O (2):O (2′),N,O (6):O (6′)]

In the title compound, [Cu(C(7)H(3)NO(4))(C(5)H(5)N)](n), the Cu(II) atom is in a slightly distorted octa­hedral coordination environment. Each Cu(II) atom is bound to two N atoms and one O atom of the pyridine­dicarboxyl­ate (PDA) ligand in a tridentate manner, one N atom of the pyridine mol­ecule and two bridging carboxyl­ate O atoms of adjacent PDA ligands, leading to a linear one-dimensional chain running along the c axis. These chains are further assembled via weak C—H⋯O and π–π inter­actions into a three-dimensional supra­molecular network structure. The centroid–centroid distance between the π–π inter­acting pyridine rings is 3.9104 (13) Å. The two N atoms are trans to each other with respect to Cu.