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| Content Provider | Springer Nature Link |
|---|---|
| Author | Vaz, Nirmala |
| Copyright Year | 2001 |
| Abstract | Kinetics of oxidation of acidic amino acids (glutamic acid (Glu) and aspartic acid (Asp)) by sodium N-bromobenzenesulphonamide (bromamine-B or BAB) has been carried out in aqueous HClO$_{4}$ medium at 30°C. The rate shows first-order dependence each on [BAB]$_{o}$ and [amino acid]$_{o}$ and inverse first-order on [H$^{+}$]. At [H$^{+}$] > 0·60 mol dm$^{−3}$, the rate levelled off indicating zero-order dependence on [H$^{+}$] and, under these conditions, the rate has fractional order dependence on [amino acid]. Succinic and malonic acids have been identified as the products. Variation of ionic strength and addition of the reaction product benzenesulphonamide or halide ions had no significant effect on the reaction rate. There is positive effect of dielectric constant of the solvent. Proton inventory studies in H$_{2}$O-D$_{2}$O mixtures showed the involvement of a single exchangeable proton of the OH$^{−}$ ion in the transition state. Kinetic investigations have revealed that the order of reactivity is Asp > Glu. The rate laws proposed and derived in agreement with experimental results are discussed. |
| Starting Page | 325 |
| Ending Page | 332 |
| Page Count | 8 |
| File Format | |
| ISSN | 02534134 |
| Journal | Journal of Chemical Sciences |
| Volume Number | 113 |
| Issue Number | 4 |
| e-ISSN | 09737103 |
| Language | English |
| Publisher | Springer India |
| Publisher Date | 2001-01-01 |
| Publisher Institution | Indian Academy of Sciences |
| Publisher Place | New Delhi |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Acidic amino acids bromamine-B oxidation kinetics acid medium Chemistry/Food Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry |
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