Kinetics and mechanism of decomposition of intermediate complex during oxidation of pectate polysaccharide by potassium permanganate in alkaline solutions

✍ Scribed by Khalid S. Khairou

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 105 KB
• Volume: 35
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.10100

✦ Synopsis

Abstract

The kinetics of decomposition of an [Pect·Mn^VI^O~4~^2−^] intermediate complex have been investigated spectrophotometrically at various temperatures of 15–30°C and a constant ionic strength of 0.1 mol dm^−3^. The decomposition reaction was found to be first‐order in the intermediate concentration. The results showed that the rate of reaction was base‐catalyzed. The kinetic parameters have been evaluated and found to be Δ__S__^≠^ = − 190.06 ± 9.84 J mol^−1^ K^−1^, Δ__H__^≠^ = 19.75 ± 0.57 kJ mol^−1^, and Δ__G__^≠^ = 76.39 ± 3.50 kJ mol^−1^, respectively. A reaction mechanism consistent with the results is discussed. © 2002 Wiley Periodicals, Inc. Int J Chem Kinet 35: 67–72, 2003