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  Global Journal of Inorganic Chemistry. Volume 2, Issue 3 (2011) pp. 203-218
  Review Article
 
Benzoyl hydrazones of 2-hydroxyacetophenone family as versatile tridentate ligands for oxovanadium(V)
  Tapas Ghosh  
     
Post Graduate Department of Chemistry, Ramakrishna Mission Vivekananda Centenary College, P. O. – Rahara, Kolkata – 700118, India
   
  Abstract  
  [VIVO(acac)2], on reaction with equimolar amount of benzoyl hydrazone of  2-hydroxyacetophenone and its 5-substituted derivatives (containing two intermediate basic phenolic and amide moieties along with a neutral imine moiety) afforded mainly oxovanadium(V) complexes with VO3+, V2O34+ and VO2+ motifs depending upon the reaction medium (i.e., nature of the solvent e.g., hydroxylic or non-hydroxylic) and also its pH via aerial oxidation. The oxovanadium(IV) complexes were only been obtained in mixed-ligand system in presence of 2,2′-bipyridine or 1,10-phenanthroline (a typical neutral NN donor ligand) as coligand, which have appreciable stability in the solid state but are not very stable in solution. Complexes with VO3+, V2O34+ and VO2+ motifs are interconvertible.
     
  Keywords  
  Oxovanadium(IV) complexes; Oxovanadium(V) complexes; Dioxovanadium(V) complexes; Mixed-ligand complexes; Hydrazone complexes  
     
   
   
   
   
     

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