Kinetic, Mechanistic, and Thermodynamic Studies for Oxidation of L-Alanine by Alkaline Sodium Periodate in Presence of Os(VIII) in its Nano Concentration Range as Homogenous Catalyst

• Main Authors: Madhu Gupta, Amrita Srivastava, Sheila Srivastava
• Format: Article
• Language: English
• Published: Diponegoro University 2018-08-01
• Series: Bulletin of Chemical Reaction Engineering & Catalysis
• Subjects: sodium periodate; kinetics; l-alanine; os(viii) catalysis; oxidation
• Online Access: https://ejournal2.undip.ac.id/index.php/bcrec/article/view/1583

The kinetics and mechanism of homogenously Os(VIII) catalysed oxidation of L-alanine (L-ala) by alkaline sodium periodate in temperature range 30 to 45°C have been studied. The involvement of free radicals was observed in the reactions. The oxidation products were acetaldehyde and IO3-, identified by spot test and spectroscopic studies. The stoichiometry between [L-ala]: IO4- is 1:2. The reaction show negligible effect of mercuric acetate and ionic strength of medium. The experimental results show first order in oxidant [NaIO4] and negative effect of [OH-]. The order in [Os(VIII)] as well as L-alanine was unity. A mechanism involving the formation of complex between L-alanine and Os(VIII) was proposed. The reaction constants concerned in the different steps of mechanism were calculated at different temperature. The activation parameters for the slow step of mechanism were computed and discussed. The thermodynamic quantities were also calculated for the reaction. Copyright © 2018 BCREC Group. All rights reserved Received: 11st October 2017; Revised: 11st February 2018; Accepted: 18th February 2018; Available online: 11st June 2018; Published regularly: 1st August 2018 How to Cite: Gupta, M., Srivastava, A., Srivastava, S. (2018). Kinetic, Mechanistic, and Thermodynamic Studies for Oxidation of L-Alanine by Alkaline Sodium Periodate in Presence of Os(VIII) in its Nano Concentration Range as Homogenous Catalyst. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2): 355-364 (doi:10.9767/bcrec.13.2.1583.355-364)