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Kinetics and mechanism of structural transformations of 2-(5-ethoxycarbonylmethyl-4-oxothiazolidin-2-ylidene)-N-(2-phenylethyl)-ethanamide during heating

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Authors
Minić, Dragica M.
Djordjevic, M.
Džambaski, Zdravko
Šumar-Ristović, Maja
Marković, Rade
Article (Published version)
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Abstract
The kinetics and mechanism of the structural transformation of 2-(5-ethoxycarbonylmethyl-4-oxothiazolidin-2-ylidene)-N-(2-phenylethyl)-ethanamide in non-isothermal conditions were studied by using isoconversion as well as non-isoconversion techniques. It was shown that the crystal, Z-form of compound, was stable in the temperature range from room temperature to melting point, when E-form of compound was formed. This process involves the breaking of crystal structure and the forming of glass material as a new phase, which by cooling forms crystal of the E-form of compound very slowly. The dependences of kinetic parameters on fractional extent conversion were determined indicating a very complex process which involves more than one elementary step, as can be expected for most solid state reactions. The possible mechanism of the process was discussed according to the algorithm concerning the form of these dependences. The evaluation of kinetics parameters and isokinetic relationships were... done by combination of model fitting and model-free approach.

Keywords:
activation energy / phase transformation / glass materials
Source:
Russian Journal of Physical Chemistry A, 2011, 85, 13, 2288-2294
Publisher:
  • Maik Nauka/Interperiodica/Springer, New York
Projects:
  • Experimental and theoretical study of reactivity and biological activity of stereodefined thiazolidines and their synthetic analogues (RS-172020)

DOI: 10.1134/S0036024411130164

ISSN: 0036-0244

WoS: 000297922700009

Scopus: 2-s2.0-85064506010
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/820
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