Xh. Bu et al., STABILIZATION OF NICKEL(III) ION BY NEW MACROCYCLIC DIOXOTETRAAMINES BEARING FUNCTIONAL PENDANT DONORS, Polyhedron, 15(1), 1996, pp. 161-163
Two new macrocyclic dioxotetraamine ligands bearing 2-methyl pyridine
and 8-methylquinoline as additional pendant donors have been found to
stabilize the trivalent oxidation state of nickel, but destabilize the
trivalent oxidation state of copper