STUDIES OF TRANSITION METAL COMPLEXES DERIVED FROM HETEROCYCLIC SCHIFF BASES

Complexes of Cu (II) and Ni (II) Schiff bases have been synthesised using Schiff bases which are derived by the reaction of Benzoinoxime primary ligand with heterocyclic compounds such as 2- aminopyridine (S-L2), 2-2′-bipyridine (S-L4) to form the secondary ligand and metal halides of corresponding metals. The elemental analysis data shows that the metal to ligand ratio in all Ni(II) and Cu(II) simple complexes are 1:2 while for mixed ligand complexes having ratio 1:2:2 for S-L2 while it is 1:2:1 for S-L4. The structural features have been determined from IR, UV-Vis, XRD and ESR data. All the complexes exhibit a distorted octahedral geometry to mononuclear Ni (II), Cu (II) complexes of mixed ligands. All the synthesised ligands and their metal complexes were screened for antimicrobial activity