Bis(4-carboxypyridine-2-carboxylato-κ2N,O2)copper(II) dimethyl sulfoxide disolvate

Abstract

In the title complex, [Cu(C7H4NO4)2]·2C2H6OS, the CuII atom is situated on an inversion centre and is N,O-chelated by two monoanionic 4-carboxypyridine-2-carboxylate ligands in a slightly distorted square-planar coordination geometry. The dimethyl sulfoxide solvent molecules and CuII complex molecules are linked by O—H...O hydrogen bonding. In addition, C—H...O contacts and π–π interactions [centroid–centroid distance = 3.590 (1) Å] occur.