Crystal structure of the monoclinic phase (phase IV) of bis­(tetra­methyl­ammonium) tetra­chlorido­cuprate(II)

摘要

The crystal structure of the low-temperature monoclinic phase of the title compound, [(CH3)4N]2[CuCl4], was determined at 120 K. The structure of the room-temperature phase has been determined in the ortho­rhom­bic space group Pmcm [Morosin & Lingafelter (1961). J. Phys. Chem. 50–51; Clay et al. (1975). Acta Cryst. B>31 289–290]. The asymmetric unit consists of one discrete tetra­chlorido­cuprate anion with a distorted tetra­hedral geometry and two tetra­methyl­ammonium cations. In the crystal, the cations and the anions are linked via weak C—H⋯Cl hydrogen bonds.