Diaquabis(hydrogen phthalato)copper(II), a new phase

Article abstract of DOI:10.1107/S0108270199011610

In the title compound, β-[Cu(C₈H₅O₄)₂(H ₂O)₂]_n, the Cu atom lies on an inversion centre and has a tetragonal distortion from octahedral symmetry. Each hydrogen phthalate ligand is coordinated to two metals, forming a polymeric structure. The aromatic ring and the carboxylate group form an approximate plane, with the carboxylic acid group plane almost perpendicular to it. An intermolecular hydrogen bond between hydrogen phthalate groups is observed, with an O...O distance of 2.614 (2) A.