Micellar effect-on the kinetics of acid catalysed bromination of some aromatic ketones
| Main Authors: | A. K. Panigrahi, (Mrs.) S. Misra, M. Patrab, B. K. Sinha |
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| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1999
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5852004 |
Daftar Isi:
- Remunda College, Remunda-768 103, India P. G. Department of Environmental Sciences, Sambalpur University, Jyoti Vihar-768 019, India Manuscript received 27 May 1998, revised 5 April 1999, accepted 20 April 1999 The effect of anionic surfactant sodium dodecyl sulphate (SDS) on the kinetics of bromination of acetophenone and two parasubstituted acetophenones (4-X-C6H4COCH3, X = H, Cl, OMe) has been studied using bromine solution in 87% acetic acid at 35-50°. The concentration of SDS is varied and maintained beyond its critical micellar concentration. Perchloric acid has been used to catalyse the bromination and the reaction performed at a constant ionic strength using sodium perchlorate. The rate accelerates on increasing the concentration of SDS, HClO4 and temperature following the sequence : p-chloro < unsubstituted < p-methoxy-acetophenone. The thermodynamic parameters for the reaction have been evaluated.