European Journal of Chemistry 2012, 3(2), 196-201. doi:10.5155/eurjchem.3.2.196-201.583

Kinetics and mechanism of aquation of bromopentammine cobalt(III) cation assisted by ion-pairing succinate anion in ethane-2-diol-water mixtures


Amel Moustafa Ismail (1,*) , Seleim Mohamed Seleim (2) , Amal Abd-El-Hamid Zaghloul (3) , Mohamed Fawzy Amira (4)

(1) Chemistry Department, Faculty of Science, Alexandria University, Ibrahimia, Alexandria, 21321, Egypt
(2) Chemistry Department, Faculty of Science, Alexandria University, Ibrahimia, Alexandria, 21321, Egypt
(3) Chemistry Department, Faculty of Science, Alexandria University, Ibrahimia, Alexandria, 21321, Egypt
(4) Chemistry Department, Faculty of Science, Alexandria University, Ibrahimia, Alexandria, 21321, Egypt
(*) Corresponding Author

Received: 04 Jan 2012, Accepted: 09 Mar 2012, Published: 30 Jun 2012

Abstract


The aquation kinetics of bromopentammine cobalt(III) ion has been investigated in the presence of different concentrations of succinate ion in aqueous medium and that mixed with ethane-1,2-diol (up to 50%, w/w) within the temperature range (35-65 oC). The ion-pairing succinate ion concentration (L) and the observed rate constant have been determined at different experimental conditions. The thermodynamic parameters of activation have been calculated and discussed in terms of solvent effects. Also the extrathermodynamic analyses of the obtained results have been discussed on the basis of solute-solvent and solvent-solvent interactions. An empirical correlation between the rate coefficient and the concentration of the ion-pairing succinate ligand (L) has been established and a suggested reaction mechanism is proposed.

3_2_196_201_800


Keywords


Ion-pairing; Ethane-1,2-diol; Solvent effect; Thermodynamics; Kinetics of aquation; Bromopentammine cobalt(III)

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DOI: 10.5155/eurjchem.3.2.196-201.583

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How to cite


Ismail, A.; Seleim, S.; Zaghloul, A.; Amira, M. Eur. J. Chem. 2012, 3(2), 196-201. doi:10.5155/eurjchem.3.2.196-201.583
Ismail, A.; Seleim, S.; Zaghloul, A.; Amira, M. Kinetics and mechanism of aquation of bromopentammine cobalt(III) cation assisted by ion-pairing succinate anion in ethane-2-diol-water mixtures. Eur. J. Chem. 2012, 3(2), 196-201. doi:10.5155/eurjchem.3.2.196-201.583
Ismail, A., Seleim, S., Zaghloul, A., & Amira, M. (2012). Kinetics and mechanism of aquation of bromopentammine cobalt(III) cation assisted by ion-pairing succinate anion in ethane-2-diol-water mixtures. European Journal of Chemistry, 3(2), 196-201. doi:10.5155/eurjchem.3.2.196-201.583
Ismail, Amel, Seleim Mohamed Seleim, Amal Abd-El-Hamid Zaghloul, & Mohamed Fawzy Amira. "Kinetics and mechanism of aquation of bromopentammine cobalt(III) cation assisted by ion-pairing succinate anion in ethane-2-diol-water mixtures." European Journal of Chemistry [Online], 3.2 (2012): 196-201. Web. 15 Nov. 2019
Ismail, Amel, Seleim, Seleim, Zaghloul, Amal, AND Amira, Mohamed. "Kinetics and mechanism of aquation of bromopentammine cobalt(III) cation assisted by ion-pairing succinate anion in ethane-2-diol-water mixtures" European Journal of Chemistry [Online], Volume 3 Number 2 (30 June 2012)

DOI Link: https://doi.org/10.5155/eurjchem.3.2.196-201.583

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