Synthesis, characterization, and crystal structures of oxidovanadium(V) complexes derived from similar hydrazone and benzohydroxamate mixed ligands

ABSTRACT

Two new oxidovanadium(V) complexes with the general formula [VOL(bha)], where L represents the deprotonated hydrazone ligands 2-hydroxy-N'-(4-methoxybenzylidene)naphthohydrazide (H₂L¹) for 1 and N'-(2-chlorobenzylidene)-2-hydroxynaphthohydrazide (H₂L²) for 2, and bha represents the monoanionic form of benzohydroxamic acid (Hbha), have been prepared and characterized by elemental analysis, infrared and UV-Vis spectra, and thermal behavior. Structures of the complexes have been further determined by single-crystal X-ray diffraction. The V atoms in the complexes are coordinated by the three donor atoms of the hydrazone ligands, the oxygen atoms of the benzohydroxamate ligands, and oxido oxygen atoms, constituting octahedral coordination spheres.

KEYWORDS:

• Hydrazone ligand
• benzohydroxamate ligand
• oxidovanadium complex
• crystal structure
• thermal property