The Nature of the Micellar Stern Region As Studied by Reaction Kinetics. 2,1
The Journal of Organic Chemistry(2004)
Abstract
The nature of the rate retarding effects of cationic, anionic and nonionic micelles on the water-catalysed hydrolysis reactions of 1-benzoyl-3-phenyl-1,2,4-triazole (1) and p-methoxyphenyl dichloroacetate (2) has been studied by kinetic methods using UV/VIS spectroscopy. A comparison was made between medium effects in micellar solutions and in solutions of a model compound, in which the model compound is a small molecule resembling the surfactant headgroup. The rate retarding effect of micelles on the hydrolysis of 1 and 2 was shown to be largely caused by the high concentration of headgroups in the Stern region where 1 and 2 bind to the micelle. Other factors which contribute to the rate inhibition are also briefly discussed.
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