Application of Stepwise Self-Association Models for the Analysis of Reaction Rates in Aggregates of Tri-n-octylalkylammonium Salts

摘要

Tri-n-octylalkylammonium salts, 1, form small, polydisperse aggregates and do not have a critical micelle concentration. Rate enhancements of decarboxylation of 6-nitrobenzisoxazolecarboxylate ion in 1c (alkyl) = Et) and 1e (alkyl = 2-hydroxyethyl) and dephosphorylation of 2,4-dinitrophenyl phosphate were analyzed by using a one-parameter self-association scheme of aggregation. Reactions of 2,4-dinitrochlorobenzene, bis(2,4-dinitrophenyl) phosphate and p-nitrophenyl diphenyl phosphate with 1e at high pH were analyzed by using a similar model. Better fits of the data were obtained than with schemes based on a simple mass-action model.