DISCUSSION OF THE COMPLEX KINETIC RESULTS OBTAINED IN THE OXIDATION OF POLY(PROPYLENE GLYCOL)(MW=425, 1000) BY CR(VI) IN A HIGH PERCHLORIC-ACID MEDIUM

Authors
SIERRA ML RODENAS E
Citation
Ml. Sierra et E. Rodenas, DISCUSSION OF THE COMPLEX KINETIC RESULTS OBTAINED IN THE OXIDATION OF POLY(PROPYLENE GLYCOL)(MW=425, 1000) BY CR(VI) IN A HIGH PERCHLORIC-ACID MEDIUM, Anales de quimica, 92(3), 1996, pp. 180-185
Citations number
19
Categorie Soggetti
Chemistry
Journal title
Anales de quimica → ACNP
ISSN journal
11302283
Volume
92
Issue
3
Year of publication
1996
Pages
180 - 185
Database
ISI
SICI code
1130-2283(1996)92:3<180:DOTCKR>2.0.ZU;2-U
Abstract
The oxidation of poly(propylene glycol)(PPG) (MW=425, 1000) by Cr(VI) has been studied in a highly concentrated perchloric acid medium. The kinetic results do not fit a first order rate equation, but they do fi t a two-exponential rate equation, as 1-MetOH and 1-EtOH oxidations do . These kinetic results are explained by the formation of a complex be tween Cr(VI) and the perchloric acid, which would be a stronger oxidan t than the chromic acid, as in the 1-MetOH and 1-EtOH oxidations, but with ether slow steps in the reaction mechanism. The influence of the temperature on the reaction has also been studied.