Reaction Kinetics, Mechanisms and Catalysis

, Volume 123, Issue 2, pp 473–484 | Cite as

Enthalpy-entropy compensation effect and other aspects of isoparametricity in reactions between trans-2,3-bis(3-bromo-5-nitrophenyl)oxirane and arenesulfonic acids

  • Igor Shpan’koEmail author
  • Irina Sadovaya


It was found that as a result of the non-additivity (interaction) of joint effects of structure and temperature on the rate and free energy of activation of the reactions between trans-2,3-bis(3-bromo-5-nitrophenyl)oxirane and Y-substituted arenesulfonic acids YC6H4SO3H in a mixture of dioxane with 1,2-dichloroethane (7 : 3/v : v) at 265, 281, and 298 K, the cross reaction series exhibits isoparametric properties. At a temperature of 265 K, close to the isoparametric temperature point 262 K (isokinetic temperature), the free energy of activation and the rate of oxirane ring opening process do not depend on the structure of the substituent Y due to the enthalpy-entropy compensation effect. At the isoparametric point with respect to the constant of substituent Y (σY = 0.20), the free activation energy does not depend on temperature.


Oxirane ring opening trans-2,3-bis(3-bromo-5-nitrophenyl)oxirane Arenesulfonic acids Isoparametricity phenomenon Compensation effect 


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2017

Authors and Affiliations

  1. 1.Donetsk National UniversityVinnytsiaUkraine
  2. 2.Donetsk National UniversityDonetskUkraine

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