✦ LIBER ✦

Kinetics and thermodynamic parameters of the thermal decomposition of imipramine hydrochloride and trimipramine maleate

✍ Scribed by Rafie H. Abu-Eittah; Laila T. Kamel

Publisher: John Wiley and Sons
Year: 2003
Tongue: English
Weight: 182 KB
Volume: 35
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.10107

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✦ Synopsis

Abstract

Thermal decomposition of imipramine hydrochloride and trimipramine maleate has been investigated isothermally and nonisothermally. The kinetic parameters, namely the activation energy E~a~ and the Arrhenius preexponential term A, were calculated. Applying the theory of activated complex to the process of decomposition one calculated Δ__S__^≠^, Δ__H__^≠^, and Δ__G__^≠^ for the reaction. The values of E~a~ as well as the thermodynamic functions did not vary significantly with temperature of the reaction whereas the preexponential term showed a significant dependence on the reaction temperature. Both imipramine hydrochloride and trimipramine maleate showed two main steps of decomposition. Each step proved to be a first‐order reaction. The rate constant was calculated for each step, and the results were analyzed statistically. © 2003 Wiley Periodicals, Inc. Int J Chem Kinet 35: 166–179, 2003

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