Formation of a dicopper(I) helicate by oxidative dehydrogenation of a monomeric copper(II) polyamine complex

Reaction of the monomeric polyamine complex [Cu-II(1)](2+) with OH- and O-2 gives the dimeric double-helix complex [Cu-2(I)(2)(2)](2+), in which the -CH2-NH- amine groups have been dehydrogenated to -CH=N- functions