“…Rates of many reactions of hydrophobic compounds, or polyvalent counterions, are affected by surfactant at concentrations below the cmc in water. These rate effects are understandable in terms of reactant-induced micellization, although in some reactions there are rate extrema in very dilute surfactant due to acceleration by premicelles [7,[13][14][15]. The association constant of the substrate can also be written in terms of the concentration of micelles, and the equilibrium constants then differ by the value of the micellar aggregation number which is generally ca.…”