Oxovanadium(IV) complexes of citric and tartaric acids in aqueous solution

Tamas Kiss, Péter Buglyó, Daniele Sanna, Giovanni Micera, Patrick Decock, Dorothee Dewaele

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Abstract

The complex-formation processes taking place in the systems containing VO(IV) and d-, l-, dl- or meso-tartaric acid or citric acid in aqueous solution were re-examined by combined use of pH potentiometry and spectroscopic (EPR and electronic absorption) methods. The results allowed a full characterization of the dinuclear species existing in the VO(IV)-d-, l- and dl-tartrate systems and indicated a different complexation behaviour in the corresponding meso-tartrate system. As its conformation is unfavourable for dimer formation, the meso ligand yields predominantly cyclic trinuclear species, one of them exhibiting distinctive EPR features. In the VO(IV)-citrate system, dinuclear species with structures different from those of the VO(IV) tartrates are suggested.

Original languageEnglish
Pages (from-to)145-153
Number of pages9
JournalInorganica Chimica Acta
Volume239
Issue number1-2
DOIs
Publication statusPublished - Nov 1995

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Keywords

  • Citric acid complexes
  • Oxo complexes
  • Tartaric acid complexes
  • Vanadium complexes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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