Synthesis of New Tetraaza Macrocyclic Ligands with Cyclohexane Rings and their Ni(II) and Cu(II) Complexes

Abstract

The tetraaza macrocyclic ligand 3,14-dimethyl-2,6,13,17-tetraazatricyclo docosa-2,12-diene(B), that contains two cyclohexane rings, has been prepared as its dihydroperchlorate salt by the nontemplate condensation of methyl vinyl ketone with 1,2-diaminocyclohexane and perchloric acid. Reduction of B with sodium borohydride produces 3,14-dimethyl-2,6,13,17-tetraazatricyclodocosane(C). Square planar Ni(Ⅱ) and Cu(Ⅱ) complexes of B and C have been prepared by the reaction of the metal ions and the ligands. Synthesis, characterization, and the properties of the ligands and their metal complexes are reported.