Synthesis, Reactions, and Physicochemical Characterization of Mixed Ligand Complexes of Zinc(II) Containing Schiff Bases and Pyrazoline Ligands

Abstract

A series of mixed ligand complexes of Zn(II) of molecular formula Zn(C₁₅H₁₂N₂OX)(C₆H₄OCHNY) where X= ‒H, ‒CH₃, ‒OCH_3, Cl, and Y=C₇H₇, C₅H₄N, C₆H₄NO₂, (C₁₅H₁₂N₂OX) = [3(2′hydroxyphenyl)-5-(4′-X-substituted phenyl) pyrazolines], and (C₆H₄OCHNY) = Schiff base have been synthesized. These complexes were prepared by reacting the solution of ZnCl₂ in THF with sodium salts of Schiff base ligands. The resulting product was treated with sodium salts of various pyrazolines ligands in 1:1 molar ratio. The synthesized complexes have been characterized by elemental analysis (C, H, N), Volhard's method, melting point, spectroscopic (IR, UV-Visible, ESR, FAB-MS), and magnetic studies. Antibacterial and antifungal potential of complexes of these newly synthesized derivatives are also discussed.

Keywords:

• Zn(II)
• Schiff base
• pyrazoline

Acknowledgments

The authors are thankful to Head, Department of Chemistry, DDU Gorakhpur University, SAIF, CDRI, Lucknow (India) and BHU, Varanasi (India) for providing the necessary spectral and analytical data.