?LIGAND EFFECT ON OXIDATION RATES OF CYSTEINE BY IRON (III) COMPLEXES

Authors

  • Hamzeb M Abdel- Halim Department of Chemistry Sultan Qaboos University, Muscat, Sultanate of Oman
  • Salama B Salama Department of Chemistry Sultan Qaboos University, Muscat, Sultanate of Oman
  • Suad K Al- Burtamani Department of Chemistry Sultan Qaboos University, Muscat, Sultanate of Oman

Keywords:

Cysteine, Iron (III), Oxidation

Abstract

Kinetics of oxidation of cysteine by iron(III). complexes of urea, CP/' Hp,-NCS-, CN-, acac, phen, and EDTA were
studied by stopped-flow spectrophotometry. Kinetic measurements were done at constant ionic strength in aqueous
solutions at 25°C. Reaction rates were measured spectrophotometrically by following the change in the oxidizing agent
concentration under pseudo-first order conditions in which theconcentration of cysteine was between one and two orders
of magnitudes greater than that of theiron (III) complex. The results showed that the observed rate of the redox reaction
depended inversely on both the strengthof the ligand in the iron (III)complex and its size.

Published

1998-04-20

How to Cite

Halim, H. M. A.-., Salama, S. B., & Burtamani, S. K. A.-. (1998). ?LIGAND EFFECT ON OXIDATION RATES OF CYSTEINE BY IRON (III) COMPLEXES. Biological Sciences - PJSIR, 41(2), 71–74. Retrieved from http://biostaging.pjsir.org/index.php/biological-sciences/article/view/2235

Issue

Vol. 41 No. 2 (1998): Pakistan Journal of Scientific and Industrial Research

Section

Articles