Mixed Ligand Complexes of Oxovanadium(V) with Dipicolinic Acid and Some Monobasic Bidentate Nitrogen, Oxygen Donor Ligands

Department of Chemistry, University of Delhi, Delhi-110 007

Manuscript received 3 January 1983, accepted 1 July 1983

The reactions of oxovanadium(V) trichioride and oxovanadium(V) triethoxide with dipicolinic acid (primary ligand, dipicH₂) and several nitrogen, oxygen donor molecules (secondary ligand, N — OH) viz., picolinic acid, nicotinic acid, isonicotinic acid, glycine, aminophenol, o-aminobenzoic acid and p-aminobenzoic acid have been studied in anhy­drous benzene. The reaction products isolated are of the types (VO(dipic)(dipicH)] and [VO(dipic)(N — O)] and have been characterized by elemental analyses, magnetic moment and infrared spectral studies. The parent complex [VO(dipic)(dipicH)] is found to have a seven coordinate, monomeric structure. A polymeric seven coordinate structure has been assigned for the mixed ligand complexes.