Bis(dimethylammonium) bis(pyridine-2,5-dicarboxylato)copper(II)

In the title compound, (C2H8N)2[Cu(C7H3NO4)2], the CuII atom lies on an inversion centre and is coordinated in a slightly deformed square-planar geometry by two N and two O atoms from pyridine-2,5-dicarboxyl­ate ligands. The complex anions are linked via weak coordination of an O atom of the 2-carboxyl­ate group to the Cu atom of a neighbouring complex, forming chains along the a axis. There are N—H⋯O hydrogen bonds between dimethyl­ammonium cations and the 5-carboxyl­ate group of the ligand.