The Organization of Two Soft (Cu2Ө, Ni2Ө) Metal Centers in Heterotrinuclear Complexes of a Macrocyclic Ligand by Cocomplexation with Ba2Ө

The short distances between the two transitionmetal centers in the trinuclear complexes 3 are caused by cocomplexation of Ba2Ө: Cu2Ө:...Cu2Ө 3.50, Ni2Ө ...Ni2Ө 3.42 A. The macrocyclic ligand is formed as the complex 2 from o-phenylenediamine and 1 in the presence of Ba2Ө. Complexes 3, in turn, are obtained by treatment of 2 with copper or nickel acetate.