Synthesis and characterization of N,O type Schiff base ligand and investigation of their transition metal complexes

In this study, p-aminoacetophenoneoxime has been described previously [10]. The ligand of 5-bromo-3-methoxysalicyliden-p-iminoacetophenone oxime (LH) was prepared by the reaction of 5-bromo-3-methoxsalicylaldehyde with this compound containing oxime. The complexes were prepared by the reaction of these Schiff base ligand with Co+2, Ni+2, Cu+2 and Zn+2 acetate. Schiff base obtained have been characterized by their elemental analyses, IR, 1H-NMR, 13C-NMR, magnetic susceptibility and thermogravimetric analyses (TGA). Schiff base was found to be bidentate ligand involving the imino nitrogen and phenolic oxygen atoms in the complexes. Metal to ligand ratio were found to be 1:2 for all of the complexes. Co+2, Ni+2 and Zn+2 complexes have been found tetrahedral geometry and Cu+2 complex has been found four coordinated geometry.Keywords: Schiff base, transition metal complexes.