Synthesis and Structural Studies on Ternary Complexes of VO(IV) ZrO(IV) with Isonitrosoacetophenone-2-picoloyl-hydrazone as Primary and 1-(o-Methoxy-Anilinomethyl)-5-Phenoxybenzimidazolen as Secondary Ligand <

Abstract

Ternary complexes of VO(IV) and ZrO(IV) with isonitrosoacetophenone-2-
picoloylhydrazone (INAPH) as primary and 1-(o-methoxyanilinomethyl)-5-
phenoxybenzimidazole (MAMPB) as secondary ligand have been synthesised
and characterised on the basis of analytical, magnetic and spectral studies.
Analytical data suggested 1 : 1 : 1 (M-L-L') stoichiometric composition for the
ternary complexes [where M = VO(IV)/ZrO(IV), L = INAPH and
L' = MAMPB]. Electrolytic conductance data revealed 1 : 1 electrolytic nature
of  VO(IV) complexes only. However, very low values of conductance in case
of  ZrO(IV) complexes, indicate their non-electrolytic behaviour. Reflectance
spectra of  VO(IV) complexes suggested distorted octahedral geometry for them.
IR spectra of the ligands and complexes showed tridentate and bidentate behaviour
of the hydrazone and Mannich base ligands respectively.  ZrO(IV)
complexes possess hepta-coordinated structure.