Kinetics and Mechanism of Oxidation of Isoleucine by N-Bromophthalimide in Aqueous Perchloric Acid Medium
The kinetics of oxidation of isoleucine with N-bromophthalimide has been studied in perchloric acid medium potentiometrically. The reaction is of first order each in [NBP] and [amino acid] and negative fractional order in [H+]. The rate is decreased by the addition of phthalimide. A decrease in the...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2011/917657 |
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| author | N. M. I. Alhaji S. Sofiya Lawrence Mary |
| author_facet | N. M. I. Alhaji S. Sofiya Lawrence Mary |
| author_sort | N. M. I. Alhaji |
| collection | DOAJ |
| description | The kinetics of oxidation of isoleucine with N-bromophthalimide has been studied in perchloric acid medium potentiometrically. The reaction is of first order each in [NBP] and [amino acid] and negative fractional order in [H+]. The rate is decreased by the addition of phthalimide. A decrease in the dielectric constant of the medium increases the rate. Addition of halide ions or acrylonitrile has no effect on the kinetics. Similarly, variation of ionic strength of the medium does not affect the reaction rate. The reaction rate has been determined at different temperatures and activation parameters have been calculated. A suitable mechanism involving hypobromous acid as reactive species has been proposed. |
| format | Article |
| id | doaj-art-db8e02a42fec402d9a5b67bbd70fa217 |
| institution | Kabale University |
| issn | 0973-4945 2090-9810 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | E-Journal of Chemistry |
| spelling | doaj-art-db8e02a42fec402d9a5b67bbd70fa2172025-02-03T06:07:08ZengWileyE-Journal of Chemistry0973-49452090-98102011-01-01841728173310.1155/2011/917657Kinetics and Mechanism of Oxidation of Isoleucine by N-Bromophthalimide in Aqueous Perchloric Acid MediumN. M. I. Alhaji0S. Sofiya Lawrence Mary1P.G. and Research Department of Chemistry, Khadir Mohideen College, Adirampattinam-614 701, IndiaP.G. and Research Department of Chemistry, Khadir Mohideen College, Adirampattinam-614 701, IndiaThe kinetics of oxidation of isoleucine with N-bromophthalimide has been studied in perchloric acid medium potentiometrically. The reaction is of first order each in [NBP] and [amino acid] and negative fractional order in [H+]. The rate is decreased by the addition of phthalimide. A decrease in the dielectric constant of the medium increases the rate. Addition of halide ions or acrylonitrile has no effect on the kinetics. Similarly, variation of ionic strength of the medium does not affect the reaction rate. The reaction rate has been determined at different temperatures and activation parameters have been calculated. A suitable mechanism involving hypobromous acid as reactive species has been proposed.http://dx.doi.org/10.1155/2011/917657 |
| spellingShingle | N. M. I. Alhaji S. Sofiya Lawrence Mary Kinetics and Mechanism of Oxidation of Isoleucine by N-Bromophthalimide in Aqueous Perchloric Acid Medium E-Journal of Chemistry |
| title | Kinetics and Mechanism of Oxidation of Isoleucine by N-Bromophthalimide in Aqueous Perchloric Acid Medium |
| title_full | Kinetics and Mechanism of Oxidation of Isoleucine by N-Bromophthalimide in Aqueous Perchloric Acid Medium |
| title_fullStr | Kinetics and Mechanism of Oxidation of Isoleucine by N-Bromophthalimide in Aqueous Perchloric Acid Medium |
| title_full_unstemmed | Kinetics and Mechanism of Oxidation of Isoleucine by N-Bromophthalimide in Aqueous Perchloric Acid Medium |
| title_short | Kinetics and Mechanism of Oxidation of Isoleucine by N-Bromophthalimide in Aqueous Perchloric Acid Medium |
| title_sort | kinetics and mechanism of oxidation of isoleucine by n bromophthalimide in aqueous perchloric acid medium |
| url | http://dx.doi.org/10.1155/2011/917657 |
| work_keys_str_mv | AT nmialhaji kineticsandmechanismofoxidationofisoleucinebynbromophthalimideinaqueousperchloricacidmedium AT ssofiyalawrencemary kineticsandmechanismofoxidationofisoleucinebynbromophthalimideinaqueousperchloricacidmedium |