The EPR pattern of [CrO(cis-1,2-cyclopentanediolato)2]- and [CrO(trans-1,2-cyclopentanediolato)2]-

Sandra Signorella, Verónica Daier, Mabel Santoro, Silvia García, Claudia Palopoli, Juan Carlos González, Lazlo Korecz, Antal Rockenbauer, Luis F. Sala

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Abstract

The addition of a large excess of 1,2-cyclopentanediol to a 1:1 mixture of glutathione and CrVI at pH 7.5 stabilises the intermediate CrV species formed by the one-electron reduction of CrVI by glutathione. The isotropic EPR parameters (giso and Aiso) of the CrV species formed with both cis- and trans-1,2-cyclopentanediol correspond to those calculated for five-coordinate oxo-CrV complexes with four alcoholato donors [Cr(O)(1,2-cyclopentanediolato)2]-. The five-coordinate oxo-CrV species formed with both 1,2-cyclopentanediol isomers show very similar EPR superhyperfine patterns, but differ in their stability and the conditions required for their formation due to the different chelation ability of the cis- vs. trans-1,2-diolato moiety.

Original languageEnglish
Pages (from-to)1829-1833
Number of pages5
JournalEuropean Journal of Inorganic Chemistry
Issue number7
DOIs
Publication statusPublished - Jan 1 2001

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Keywords

  • Chromates
  • Chromium
  • EPR spectroscopy
  • Redox chemistry

ASJC Scopus subject areas

  • Inorganic Chemistry

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