Kinetics and mechanism of electron-transfer in the aquaethylene-diaminetetraacetatochromium(iii)/n-bromosuccinimide reaction |
| |
Authors: | Ahmed A. Abdel-Khalek Alaa El-Din M. Abdel-Hady Mohamed F. El-Shahat |
| |
Affiliation: | (1) Chemistry Department, Faculty of Science, Cairo University, Beni-Suef Branch, Beni-Suef, Egypt;(2) Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, Cairo, Egypt |
| |
Abstract: | Summary The oxidation of aquaethylenediaminetetraacetatochromium(III) [Cr(HEDTA)(H2O)] with N-bromosuccinimide (NBS) to yield chromium(VI) has been studied spectrophotometrically over the 20–40° C range. The rate is first order with respect to both reactants and increases with decreasing [H+] between pH 6.0 and 6.8. The thermodynamic activation parameters were calculated. The experimental rate law is consistent with a mechanism in which the deprotonated [Cr(EDTA)(OH)]2- and protonated [Cr(EDTA)(H2O)]- are the reactive species. It is proposed that electron transfer proceeds via an inner sphere mechanism.Abstracted from the PhD thesis of Alaa El-Din M. Abdel-Hady. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|