catena-Poly[[triaquacopper(II)]-μ-5-carboxybenzene-1, 3-dicarboxylato-κ2 O 1:O 3]

Abstract

In the title complex, [Cu(C9H4O6)(H2O)3] n , the CuII cation exhibits a distorted square-pyramidal coordination geometry involving five O atoms from two monodentate 5-carboxybenzene-1,3-dicarboxylate anions and three water molecules. The 5-carboxybenzene-1,3-dicarboxylate anions bridge Cu II cations into zigzag polymeric chains running along the b-axis direction. These chains are further linked by O - H⋯O hydrogen bonds between coordinating water molecules or carboxyl groups and carboxylate groups into a three-dimensional supramolecular architecture. In the crystal, π-π stacking is observed between parallel benzene rings of adjacent chains, the centroid-centroid distances being 3.584 (3) and 3.684 (3) Å.