CATALYSIS AND INHIBITION OF THE IODIDE REDUCTION OF PERACIDS BY SURFACTANTS - PARTITIONING OF REACTANTS, PRODUCT AND TRANSITION-STATE BETWEEN AQUEOUS AND MICELLAR PSEUDOPHASES

A multiple micellar pseudophase model of kinetics in aqueous surfactan t solutions is described, The model has been developed using the trans ition state pseudoequilibrium constant approach, The advantage of this approach is that no assumptions are made about the nature of the mice lle pseudophases. The kinetics of the reduction of pernonanoic and 3-c hloroperbenzoic acids by iodide in SDS, Brij-35 and Triton X-100 are r eported. The results are used to obtain the micellar association const ants of the peracids and also the apparent (virtual) micellar associat ion constants of the transition states. These are compared with the mi cellar association constants of the parent acids, obtained by pH titra tion, The association constants are discussed in terms of micellar cat alysis and inhibition. Ratios of association constants indicate the re lationship between initial, transition and final states.