Deceleration the hydrolysis reaction of ethyl acetate ester by β-cyclodextrin in basic medium: transition state analog
| Autor: | Sa’ib J. Khouri, Abdelmnim M. Altwaiq |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Standard molar entropy Cyclodextrin 010405 organic chemistry Inorganic chemistry Ethyl acetate General Chemistry Activation energy 010402 general chemistry Condensed Matter Physics 01 natural sciences Standard enthalpy of formation 0104 chemical sciences Gibbs free energy symbols.namesake chemistry.chemical_compound Hydrolysis chemistry symbols Food Science |
| Zdroj: | Journal of Inclusion Phenomena and Macrocyclic Chemistry. 87:305-311 |
| ISSN: | 1573-1111 1388-3127 |
| DOI: | 10.1007/s10847-017-0700-1 |
| Popis: | Electrical conductivity measurements were used to study the hydrolysis reaction of dilute aqueous solution of ethyl acetate with the presence β-cyclodextrin (β-CD) within a concentration range between 0.00 and 0.00750 M in basic medium at 25.0 °C. 0.00265 M of β-CD was chosen as typical concentration for studying the same reaction at different temperatures between 21.0 and 35.0 °C. Two different values of activation energy for the hydrolysis reaction of free ethyl acetate and ethyl acetate/β-CD complex were evaluated, and their values are 46.3 and 62.0 kJ mol−1 respectively. The standard Gibbs energy of activation (∆‡Go), standard enthalpy of activation (∆‡Ho), and standard entropy of activation (∆‡So) for the two different cases were evaluated. β-CD plays a notable role in retarding the rate of hydrolysis of ethyl acetate in basic medium. |
| Databáze: | OpenAIRE |
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