The coordination chemistry of divalent cobalt, nickel and copper—IX: The crystal structure and characterisation of a cationic 5-coordinate Cu(II) complex

The preparation, properties and X-ray crystal structure of [Cu(ttda)(tmen)](ClO4)2, a complex of divalent copper perchlorate with the ligands N,N,N′,N′-tetramethyl-1,2-diaminoethane (tmen) and bis-(N,N′-dimethyl-acetamido)thioether(ttda) are reported. The crystals are monoclinic with a = 15.35(1), b = 15.04(1), c = 10.91(1) A, β = 98.74(2)°, four formula units per unit cell and space group P21/n. The complex cation is shown to be penta-coordinate with a distorted square pyramidal geometry. Comparison is made with the properties and structure of the previously reported CuCl2·ttda.