Preparation and Properties of Dinuclear Schiff Base Complexes from Salicylaldehyde and 2-Aminophenol Complexes of Cu (II), Co (II) and Ni (II)
Dinuclear complexes from salicylaldehyde and 2-aminophenol with Cu (II), Ni (II) & Co (II) were obtained by new synthetic route and characterized. Elemental and metal compositions of these complexes were obtained. Infrared, UV – visible (absorption & emission) spectroscopy and mass spectrometry data were utilized for structure elucidation. The TGA thermograms of the complexes supported proposed structure. Magnetic properties of these complexes were extensively studied using Guoy balance at room temperature and vibrating sample magnetometer at variable temperatures. Low temperature intramolecular ferromagnetism was exhibited by homodinuclear complex while the heterodinuclear complexes showed antiferromagnetic coupling. A probable mechanism for the formation of the complexes was proposed. The most stable structure was identified using molecular mechanical method.