Metal complexes with chloride and triazole-based ligands: investigation of a well-resolved up–up–down–down (uudd) cyclic water tetra­mer and X—H...Cl (X = O and C) hydrogen-bonding inter­actions

The crystal structure of the title complex, trans-di­chloridotetra­kis­[1-phenyl-3-(1H-1,2,4-triazol-1-yl-κN⁴)pro­pan-1-one]copper(II) hexa­hydrate, [CuCl₂(C₁₁H₁₁N₃O)₄]·6H₂O, is isomorphous with that of the corresponding nickel and cobalt compounds. The complex has crystallographic inversion symmetry with the Cu^II atom on an inversion centre. Each Cu^II atom is six-coordinated by one N atom from each of the four 1-phenyl-3-(1H-1,2,4-triazol-1-yl)propan-1-one ligands in the equatorial plane and by two chloride ligands in axial positions. The structure includes a centrosymmetric irregular up–up–down–down (uudd) water tetra­mer cluster and O—H...Cl hydrogen bonds. Inter­molecular C—H...Cl hydrogen bonds exist between adjacent mol­ecules, resulting in a three-dimensional supramolecular network.