| Summary: | In the title compound, [CuCl(C10H8N2)2]2[Bi2Cl4(C7H3NO4)2(H2O)2]·5H2O, the dianion [Bi2Cl4(C7H3NO4)2(H2O)2]2− is located about an inversion center. The CuII atom of the cation is coordinated by four N atoms of the two chelating 2,2′-bypyridine ligands and one Cl− ion, completing a distorted trigonal–bipyramidal coordination environment. In the anion, each BiIII atom is seven-coordinate and is bonded to a tridentate pyridine-2,6-dicarboxylate ligand, a water molecule, two chloride ions and a bridging carboxylate O atom of another carboxylate ligand. The coordination geometry of BiIII is distorted pentagonal–bipyramidal with the Cl− ions located in axial positions. The structure of the dianion is additionally stabilized by an intramolecular O—H...O hydrogen bond between the coordinated water molecule and carboxylate O atom. In the crystal, O—H...O hydrogen bonds occur . The H atoms of the solvent water molecules could not be located.
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