Acetonyltri­phenyl­phospho­nium 2,3,5-tri­phenyl­tetra­zolium tetra­chlorido­cuprate(II)

The title compound, (C(21)H(20)OP)(C(19)H(15)N(4))[CuCl(4)], was obtained by reacting CuCl(2)·2H(2)O with a mixture of one equivalent of acetonyltri­phenyl­phospho­nium chloride and one equivalent of 2,3,5-tri­phenyl­tetra­zolium chloride in aceto­nitrile. In the structure, the Cu centre in the dianion is bonded to four chloride ligands and adopts a distorted tetra­hedral geometry. The phospho­nium cation likewise adopts the expected tetra­hedral geometry. The tetra­zolium ring forms dihedral angles of 77.68 (10), 26.85 (11) and 66.48 (10)° with the planes of the benzene rings of the substituent groups. In the crystal, weak C—H⋯Cl hydrogen-bonding inter­actions involving both cations and the anion give rise to a three-dimensional supra­molecular structure.