Dephosphorylation of p-nitrophenyl diphenyl phosphate (pNPDPP) and aromatic nucleophilic: substitution on 2, 4-dinitrochlorobenzene and-naphthalene (DNCB and DNCN, respectively) have been examined in aqueous micelles of the functional surfactant hexadecyl (2-hydroxyethyl) dimethylammonium hydroxide, n-C16H33N+- Me2CH2CH20HOH-(2). The variation of the first-order rate constant, lz,, with concentration ...