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Kinetics of Ce(IV) oxidation of α‐keto acids in sulfuric‐perchloric acid media
Author(s) -
Saraç A. Sezai
Publication year - 1985
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550171210
Subject(s) - chemistry , perchloric acid , cerium , sulfuric acid , decomposition , inorganic chemistry , glyoxylic acid , kinetics , sulfate , organic chemistry , physics , quantum mechanics
The rates of oxidation of four α‐keto acids, glyoxylic, pyruvic, phenylglyoxylic, and 2‐oxobutyric acids by Cerium(IV) in H 2 SO 4 HaHSO 4 and H 2 SO 4 HClO 4 solutions, have been studied spectrophotometrically. The rate data suggest that CeSO 4 2+is the most reactive of the Cerium(IV)‐sulfate complexes present in the H 2 SO 4 NaHSO 4 and H 2 SO 4 HClO 4 systems. The oxidation reaction is proposed to be a one‐electron process with the rate‐determining step being the decomposition of a α‐ketoacid‐Cerium(IV) complex to a free radical and carbon dioxide through a transition state.