Abstract

Reactions of OH- with 4-chloro-3,5-dinitrobenzoic and 2-chloro-3,5-dinitrobenzoic acids have been examined in solutions of cetyltrimethylammonium chloride, bromide and hydroxide, bis ( dodecyl ) dimethylammonium chloride, and bis(tetradecyl) dimethylammonium chloride. Rate effects were analysed quantitatively in terms of the distribution of reactants between water and the colloidal particles. It has been found that twin-tailed ionic surfactants better distinguish between favourable and unfavourable orientations of substrate molecules within micellar aggregates than do single-tailed ionic surfactants.

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