Synthesis and Structural Studies of Hydrazone Dioxime Ligand and Its Cu(II) and Ni(II) Complexes

Abstract

A hydrazone oxime (H₂L) has been prepared in EtOH by reacting 2-hydrazine hydrate (2) with 2,3-butanedione monoxime (1). Homodinuclear copper(II), nickel(II), homotetranuclear copper(II), and heterotetranuclear copper(II)–nickel(II) complexes of H₂L have been prepared. The metal complexes have been characterized by elemental analyses, magnetic moments, infrared (IR), ultraviolet–visible (UV-vis), and mass and thermal analyses studies. The dinuclear copper(II) and nickel(II) complexes of H₂L were found to have a 1:1 metal:ligand ratio. In addition, total energy and heat formation for ligands (H₂L and DHyLH₂) by semiempirical PM3 calculations have shown that H₂L is more stable than DHyLH₂.

Keywords:

• dinuclear nickel(II) complex
• hydrazone dioxime
• tetranuclear copper(II) complex

Acknowledgments

This work was supported by Karadeniz Technical University Research Fund and project code 2005.111.02.2.