CRYSTAL AND MOLECULAR-STRUCTURE OF CREATININIUM TETRACHLOROCUPRATE(II)

Preparation, crystal and molecular structure of creatininium tetrachlorocuprate(II) is described. The structure was solved by X-ray diffraction studies and was refined by least-squares methods to R = 0.041 for 1344 reflections. The compound is monoclinic, space group, P21/c. The unit cell parameters are a = 8.080(3), b = 7.831(2), c = 13.922(3) Å, β = 113.77(2)°, V = 806.2 Å3, dc = 1.786, dm = 1.77(1) g cm-3, Z = 2. The [CuCl4]2- ion is centrosymmetric and the copper atom is surrounded by four Cl atoms (CuCl1 2.233(1), CuCl2 2.268(1)) in a square planar arrangement. The creatininium cation is almost planar and each cation is linked to [CuCl4]2- units through hydrogen bonding involving the amino and imino nitrogen atoms. © 1979.