COPPER(II) AND NICKEL(II) COMPLEXES WITH ,6,13,17-TETRAAZATRICYCLO[16.4.0.0(7,12)]DOCOSANE, [M(C20H40N4)]CL-2.2H(2)O (M=CU-II AND NI-II)

The structures of imethyl-2,6,13,17-tetraazatricyclo[16.4.0.0(7,12)] d ocosane-N,N',N '',N''')copper(II) dichloride dihydrate, [Cu(C20H40N4)] Cl(2)2H(2)O, and imethyl-2,6,13,17-tetraazatricyclo[16.4.0.0(7,12)] do cosane-N,N',N '',N''')nickel(II) dichloride dihydrate, [Ni(C20H40N4)]C l-2.2H(2)O, are presented. Both complexes have an MN, square plane inv olving the four N atoms of the docosane ligand. In the copper complex, water molecules occupy the two axial positions, though the Cu ... O d istances are longer than the normal coordination ranges. In the nickel complex, the water molecules are displaced too far from the metal coo rdination sphere to be considered bonded to the Ni atom.