Tetraethylammonium tetramethylammonium tetrachlorocuprate(II), [(C2H5)4N][ (CH3)4N][CuCl4 ]

Article abstract of DOI:10.1107/S0108270196009031

The title compound contains four isolated and discrete moieties, i.e. two independent [(CH₃)₄N]⁺ cations, with one ordered on a 4 axis and the other disordered with the central N atom on a 2_z axis, one [(C₂H₅)₄N]⁺ cation, on a mirror plane and in a trans conformation, and one distorted tetrahedral [CuCl₄]^2- anion on another mirror. The crystal structure is isomorphous with that of [(C₂H₅)₄N][ (CH₃)₄N][ZnCl₄ ].