Synthesis and Characterization of Metal Complexes with Unsymmetrical Tetradentate Schiff Base Ligand

Abstract

A new unsymmetrical tetradentate Schiff base ligand (H₂L) was synthesized using 5‐chloro‐2‐hydroxybenzophenone, o‐phenylenediamine, and salicylaldehyde. Five metal complexes of this ligand, [ML] · xH₂O (M = Cu(II), Ni(II), Zn(II), Mn(II), and Co(II); x = 0–3), have been prepared and characterized by elemental analyses, IR spectra, UV spectra, and molar conductance. Possible structures of these complexes have been proposed.

Keywords:

• Metal complexes
• Schiff base ligand
• Macrocycle model
• Unsymmetric complex