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http://nopr.niscpr.res.in/handle/123456789/15765| Title: | Mechanism of oxidation of ethanolamines by sodium N-chloro-p-toluenesulphonamide in alkaline buffer medium: A kinetic study |
| Authors: | Mayanna, S M Puttaswamy Madhumathy, S |
| Issue Date: | Jun-1999 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Kinetics of oxidation of monoethanolamine (MEA), diethanolamine (DEA) and triethanolamine (TEA) by sodium Nchloro- p-toluenesulphonamide (chloramine-T, CAT) in alkaline buffer medium has been studied at 313K. The reactions followed identical kinetics being first order in [CAT] and fractional order each in [substrate] and [OH-]. Under comparable experimental conditions the rate of oxidation increases in the order: DEA > TEA > MEA. Addition of the reaction product p-toluenesulphonamide retards the reaction rate. Added chloride ions and change in ionic strength of the medium do not have any effect on the rate of the reaction . Change in dielectric constant of the medium affects the reaction rate. Activation parameters for the rate determining step are evaluated and isokinetic relation is observed with β=390 K indicating that the reactions are enthalpy-controlled. Formation and decomposition constants of substrate - CAT complexes are evaluated. Suitable mechanisms and rate equations are proposed based on the observed kinetic data. |
| Page(s): | 547-552 |
| Appears in Collections: | IJC-A Vol.38A(06) [June 1999] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 38A(6) 547-552.pdf | 1.1 MB | Adobe PDF | View/Open |
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