Synthesis and structure of new cobalt(II) copper(II), nickel(II) copper(II) and cobalt(II) nickel(II) heteronuclear complexes containing monoethanolamine

The heteronuclear (CoCuII)-Cu-II, (NiCuII)-Cu-II and (CoNiII)-Ni-II complex es containing monoethanolamine, (MEA), have been prepared using the corresp onding metal salts and MEA as starting materials. Both (CoCuII)-Cu-II and ( NiCuII)-Cu-II complexes are heterotrinuclear complexes but the (CoNiII)-Ni- II complex is heterodinuclear one. The coordination ability of Cu-II toward s MEA is stronger than Co-II and Ni-II. The separated complexes are of tetr ahedral geometry with bridged chlorides and of high stability. The thermal behaviour and thermodynamic parameters of the prepared complexes have been studied. The dependence of the electrical conductivity on temperature is ex amined and the complexes are found to be of semiconducting behaviour.