The rate of keto-enol transformation of acetylacetone or acetoethyl acetate was spectroscopically measured in the cyclohexane solutions in the presence of primary, secondary or tertiary alkylammonium propionate. The rate was enhanced by micelle formed. The order of effectiveness of the surfactants was that primary>>secondary> tertiary. The order coincides with the number of protons in the ammonium ion of the surfactants and the aggregation number of micelle.
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KON-NO et al. (1975) studied this question.
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