Pseudophase approach to the transfer of the nitroso group in water/AOT/SDS/isooctane quaternary microemulsions

The kinetics of the transfer of the nitroso group from N-methyl-N-nitroso-p -toluenesulfonamide to each of three secondary amines (piperazine, N-methyl benzylamine, and morpholine) was studied using a wide variety of water/sodi um bis(2-ethylhexyl) sulfosuccinate (AOT)/sodium dodecyl sulfate/isooctane quaternary microemulsions as reaction media. The diverse kinetic behavior o f these amines can be explained quantitatively on the basis of a single mod el taking into account the distribution of the amine between the aqueous an d isooctane phases and their mutual interface (surfactant film); the reacti on always takes place at the surfactant film. The reactivities of the amine s are discussed in comparison with the behavior observed in water and in AO T/isooctane/water ternary microemulsions.