Kinetic and mechanistic investigation on oxidation of L-alanine and L-leucine byChloramine-T (CAT) using chloro-complex of Ir(III) in its nano-concentration range as homogeneous catalyst: A comparative study

Authors(4) :-Abhishek Verma, Jyoti Pandey, Reena Patel, Sheila Srivastava

The kinetics and mechanism of homogeneously Ir(III) chloride catalysed oxidation of L-alanine (ala) and L-leucine (leu) by chloramine-T [CAT] have been investigated in a perchloric acidic medium in the presence of mercuric acetate as a scavenger in the temperature range 30ºC–45ºC. The reactions follow identical kinetics. The experimental results show the first order kinetics with respect to the oxidant [CAT] and catalyst [Ir(III)] while positive effect with respect to both of the amino acids were observed. It is found that that [Hg(OAc)2], [H+] and ionic strength(µ) of the medium have insignificant effect on the rate. Chloride ion is found to positively influence the rate of reaction. The reaction between chloramine-T and substrate (ala and leu) in acid medium shows 1:1 stoichiometry. The reactions have been studied at four different temperatures between 30 to 45 ºC and the activation parameters have been calculated. We have proposed a mechanism involving the complex formation between catalyst, substrate and oxidant. Acetaldehyde and isopentaldehyde have been identified chromatographically and spectroscopically as the final product of oxidation of ala and leu, respectively. Based on the kinetic data, reaction stoichiometry and product analysis, a suitable reaction mechanism has been proposed and the rate law has been derived. .

Authors and Affiliations

Abhishek Verma
Department of Applied Chemistry, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh, India
Jyoti Pandey
Chemical laboratories, Feroze Gandhi College, Raebareli,Uttar Pradesh,India
Reena Patel

Sheila Srivastava

Kinetics, mechanism, Ir(III) catalysis, amino acids, chloramine-T, acidic medium

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Publication Details

Published in : Volume 3 | Issue 8 | November-December 2017
Date of Publication : 2017-12-31
License:  This work is licensed under a Creative Commons Attribution 4.0 International License.
Page(s) : 590-597
Manuscript Number : IJSRSET1738166
Publisher : Technoscience Academy

Print ISSN : 2395-1990, Online ISSN : 2394-4099

Cite This Article :

Abhishek Verma, Jyoti Pandey, Reena Patel, Sheila Srivastava, " Kinetic and mechanistic investigation on oxidation of L-alanine and L-leucine byChloramine-T (CAT) using chloro-complex of Ir(III) in its nano-concentration range as homogeneous catalyst: A comparative study , International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 3, Issue 8, pp.590-597, November-December-2017.
Journal URL : http://ijsrset.com/IJSRSET1738166

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