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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(1) [January 2005] >
| Title: | Effect of non-ionic micellar aggregates on the kinetics of oxidation of aminoalcohols by N-bromosuccinimide in alkaline medium |
| Authors: | Pandey, Shalini
Upadhyay, Santosh K |
| Keywords: | Micellar aggregates
xidation of aminoalcohol
kinetics of N-bromosuccinimide |
| Issue Date: | Jan-2005 |
| Publisher: | CSIR |
| IPC Code: | C07B 33/00 |
| Abstract: |
The kinetics of oxidation of aminoalcohols (AA) viz
ethanolamine (EA), diethanolamine (DEA) and triethanolamine (TEA) by
N-bromosuccinimide (NBS) in alkaline medium have been investigated in absence
and in presence of polyoxyethylene (23) lauryl ether (Brij-35), a non-ionic
surfactant. The kinetics showed a first order dependence of rate in NBS while
the order in each AA and alkali was found to decrease from unity to zero at
higher [AA] and [OH-],
respectively. The presence of small amount of surfactant strongly enhanced the
rate of oxidation and the observed rate constants attained a constancy at
higher surfactant concentration. The premicellar kinetics have been
rationalised in the light of Piszkiewicz’s positive cooperativity model. The
binding constants between the reactants and the surfactant have also been
evaluated using Raghvan and Srinivasan model, which is applicable for a
bimolecular micellar catalysed reaction. The binding constants obtained by both
the models are in good agreement.
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| Page(s): | 35-42 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.12(1) [January 2005]
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