Investigations on some heterotrinuclear complexes of nickel(II) and copper(II)

Ni(II) and Cu(II) complexes of N,N'-bis(salicylidene-1,3-diaminopropane) were prepared and found to form linear and non-linear trinuclear complexes. Elemental analyses, IR spectroscopy, thermogravimetry and X-ray diffraction techniques applied to the complexes yielded valuable information about their moleculer structures. It was observed that mu -bridges in these trinuclear complexes form through the phenolic oxygens of the ligand or through anions present in the medium. In the presence of acetate, nitrate or nitrite, mu -bridges form between a pair of atoms resulting in linear trinuclear complexes. However, the presence of chloride or bromide results in mu -bridges involving the phenolic oxygens of N,N'-Bis(salicylidene)-1,3-diaminopropane.