Synthesis, Characterization and Biological Aspects of O- and N-Donor Schiff Base Ligands and their Co(ll),Cu(ll),and Ni(ll) Complexes

Abstract

A Schiff base is a compound with the general structure R₂C=NR`. Schiff bases and their complexes are flexible compounds synthesized from the condensation of an amino compound with carbonyl compounds and extensively used for industrial purposes and also show a broad range of biological activities including antibacterial, antifungal, antiviral, antimalarial, antiproliferative, anti-inflammatory, anticancer, anti-HIV, anthelminthic and antipyretic properties. Many Schiff base complexes show excellent catalytic activity in various reactions and in the presence of moisture. They can be considered a sub-class of imines. The term is often synonymous with azomethine which refers specifically to secondary aldimines.These are formed by the condensation reaction of primary ammines and carbonyl compounds. Furfuraldehyde and it’s various derivatives are also useful in the synthesis of Schiff bases. Schiff base forms a stable complex with metals in +2 oxidation state. Keeping all these facts into consideration, Here four new Complexes Co(ll),Zn(ll),Ni(ll) and Cu(ll) with O- and N- donor Schiff bases derived from Furfuraldehyde and Ethylenediamine have been synthesized and Characterized. In this chemical synthesis the ligands of schiff base was synthesized by the reaction of furfuraldehyde with Ethylenediammine in 2:1 ratio respectively in methanol. The analytical results and molecular weights of the compounds support the formulations. The obtained coloured crystalline Complexes are soluble in acetone and DMF but sparingly soluble in DMSO.