Solvent effect on the catalysis by cetyltrimethylammonium bromide micelles of the reaction between hydroxide ions and 2,4-dinitrochlorobenzene

Abstract

When monohydric alcohols are added to an aqueous alkaline solution of cetyltrimethylammonium bromide at fixed concentration, the micellar catalysed rate of the hydrolysis of 2,4-dinitrochloro-benzene decreases, approaching the rate of the uncatalysed reaction at a mole fraction characteristic of the co-solvent. These trends are discussed with reference to other properties of these solvent mixtures. Although added solvents generally reduce the catalysed rate, added dimethyl sulphoxide increases the rate but the effect is less dramatic than the increase in rate of the uncatalysed reaction.