ISOMERIZATION OF A LINEAR PENTAMINE, 1,4,7,10,13-PENTAAZATRIDECANE, TO A BRANCHED FORM, 4-(AMINOETHYL)-1,4,7,10-TETRAAZADECANE, ON A SCHIFF-BASE COPPER COMPLEX RELEVANT TO MULTI-COPPER ENZYMES

The 1:2 Schiff-base of 2,6-diformyl-4-methylphenol and 1,4,7,10,13-pen taazatridecane formed a tetranuclear assembly complex {Cu(II)-Cu-2(II, II)-Cu(II)} possessing a dinuclear Cu-2 core and two mononuclear Cu au xiliaries. The two-electron reduction of the complex and reoxidation i n air resulted in the formation of a dinuclear Cu-2(II,II) complex of a macrocycle comprised of 2,6-diformyl-4-methylphenol and branched 4-( 2-aminoethyl)-1,4,7,10-tetraazadecane (2:2) instead of the linear pent amine.