Synthesis and characterization of metal complexes by tridentate NOS Schiff Base ligand

Transition metal complexes with nitrogen, oxygen and sulfur donors ligands have been prepared since the beginning of the development of coordination chemistry and there is continuing interest in these complexes [1]. The presence of both hard and soft donor atoms in the backbones of unsymmetrical Schiff bases ligands, they readily coordinate with a wide range of transition metal ions[2]. The synthesis of transition metal complexes of unsymmetrical Schiff bases ligands with nitrogen, oxygen and sulfur atoms is an important area of study with implications in bioinorganic chemistry catalysis and medical chemistry [3]. In this study, tridentate NOS Schiff base ligand prepared by reaction of 2-aminothiophenol with 2-hydroxy-1-naphtaldehyde. La (III), Ce (III) Schiff base complexes of this ligand were synthesized. The Schiff base ligand and related complexes were characterized by FT-IR, UVvis, NMR, Mass spectrometry, conductivity and elemental analyses. The results show that the ligand is coordinated to metal ions through imine N and hydroxyl O and thiol S atoms