Copper(II) and Nickel(II) Complexes with 3,14-Dimethyl-2,6,13,17-tetraazatricyclo[16.4.0.0^7,12]docosane, [M(C₂₀H₄₀N₄)]Cl₂.2H₂O (M = Cu^II and Ni^II)

The structures of (3,14-Dimethyl-2,6,13,17- tetraazatricyclo[16.4.0.0^7,12]docosane-N,N′,N′′,N′′′)copper(II) dichloride dihydrate, [Cu(C₂₀H₄₀N₄)]Cl₂.2H₂O, and (3,14-Dimethyl-2,6,13,17- tetraazatricyclo[16.4.0.0^7,12]docosane-N,N′,N′′,N′′′)nickel(II) dichloride dihydrate, [Ni(C₂₀H₄₀N₄)]Cl₂.2H₂O, are presented. Both complexes have an MN₄ square plane involving the four N atoms of the docosane ligand. In the copper complex, water molecules occupy the two axial positions, though the CuO distances are longer than normal coordination ranges. In the nickel complex, the water molecules is displaced too far from the coordination sphere to be considered bonded to the Ni atom.