Kinetic Studies of Chromium-Oxygen Complex

산소를 포함한 크롬화합물에 대한 속도론적 연구

  • Won, Tae-Jin (Department of Chemistry, Changwon National University) ;
  • Lee, Yong-Ill (Department of Chemistry, Changwon National University) ;
  • Kim, Dong-Won (Department of Chemistry, Chungbuk National University)
  • 원태진 (창원대학교 자연과학대학 화학과) ;
  • 이용일 (창원대학교 자연과학대학 화학과) ;
  • 김동원 (충북대학교 자연과학대학 화학과)
  • Received : 1998.03.19
  • Published : 1999.10.25

Abstract

The kinetics for the reaction of superoxo chromium(III), $CrO{_2}^{2+}$ and glutathione(GSH) have been studied spectrophotometically in aqueous solution. Because the reaction is slow under our experimental conditions the initial rate method is used. Also the reaction fit in second order kinetics. Glutathione is oxidized by chromium complex containing oxygen. The rates of reactions depend on the presence of alcohol(MeOH or 2-PrOH) and oxygen. From these observations it is suggested the real oxidant for glutathione is not superoxo chromium, $CrO{_2}^{2+}$ but chromyl, $CrO^{2+}$.

Keywords

superoxo chromium;glutathione;chromyl

Acknowledgement

Supported by : 교육부 기초과학연구소

References

  1. Nature v.250 S. Venitt;L. S. Levy
  2. Inorg. Chem. v.31 R. N. Bose;S. Moghaddas;E. Gelerinter
  3. New J. Chem. v.18 J. F. Perez-Benito;C. Arias;D. Lamrhari
  4. J. Am. Chem. Soc. v.114 S. L. Scott;A. Balac'K. H. Espenson
  5. J. Am. Chem. Soc. v.113 S. L. Scott;A. Bakac;J. H. Espenson
  6. Struct. Bond. v.54 P. H. Connett;K. E. Wetterhahn
  7. Carcinogenesis v.15 P. Da Cruz Fresco;A. Kortenkamp
  8. J. Am. Chem. Soc. v.120 P. A. Lay;A. Levina
  9. Inorg. Chem. v.35 A. Bakac;T. J. Won;J. H. Espenson
  10. J. Am. Chem. Soc v.109 M. E. Brynildson;A. Bakac;J. H. Espenson