Synthesis and Characterization of Unsymmetrical Schiff Base Complexes Containing Thioether Donor with Mn(II), Co(III), Ni(II), Cu(II) and Cd(II) Metals Ions
For the preparation of the ligand, 2-((2-(2-(pyridine-2-ylmethyleneamino) phenylthio)ethylimino)methyl)phenol (HL), at first, unymmetric thioethere amine 2-(2-aminoethylthio)-N-(pyridine-2-ylmethyleneanilin) has been prepared through nucleophilic substitution of 2-aminothiophenol with N-(2-bromoethyl)phthalimide, then condensed with pyridine-2-carbaldehyde and then phthalimide group removed with hydrazine hydrate. Then Schiff base ligand HL was prepared via condensation of this unsymmetrical thioether amine with 2-hydroxybenzaldehyde. Mn(II), Co(III), Ni(II), Cu(II) and Cd(II) Schiff base complexes of this ligand have been synthesized. The thioether amine and unsymmetrical Schiff base ligand were characterized by appropriate spectroscopic methods such as IR, 1H NMR, 13C NMR studies, and also unsymmetrical Schiff base complexes were characterized by IR, UV-Vis, molar conductivity and elemental analysis methods.
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