Kinetics and mechanism of the chromic oxidation of myo-inositol

Mabel Santoro, Evangelina Caffaratti, Juan Manuel Salas-Peregrin, Laszlo Korecz, Antal Rockenbauer, Luis F. Sala, Sandra Signorella

Research output: Article

17 Citations (Scopus)

Abstract

The oxidation of d-myo-inositol (Myo) by CrVI yields the inosose and Cr3+ as final products when an excess of cyclitol over CrVI is used. The redox reaction takes place through the combination of CrVI → CrIV → CrII and CrVI → CrIV → CrIII pathways. Intermediacy of CrIV was evidenced by the detection of CrO22 +, formed by reaction of CrII with O2. The EPR spectra show that five- and six-coordinated oxo-CrV intermediates are formed, with the cyclitol acting as bidentate ligand. Penta-coordinated oxo-CrV species are present at any [H+], whereas hexa-coordinated ones are only observed at pH < 1, where rapidly decompose to the redox products. At higher pH, where hexa-coordinated oxo-CrV species are not observed, oxo-CrV bischelates are stable enough to remain long time in solution.

Original languageEnglish
Pages (from-to)169-177
Number of pages9
JournalPolyhedron
Volume26
Issue number1
DOIs
Publication statusPublished - jan. 2 2007

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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    Santoro, M., Caffaratti, E., Salas-Peregrin, J. M., Korecz, L., Rockenbauer, A., Sala, L. F., & Signorella, S. (2007). Kinetics and mechanism of the chromic oxidation of myo-inositol. Polyhedron, 26(1), 169-177. https://doi.org/10.1016/j.poly.2006.08.003