DISPROPORTIONATION KINETICS OF N-CL-NORMAL-PROPYLAMINE AND N-CL-ISOPROPYLAMINE

The kinetics of the disproportionation of N-Cl-n-propylamine and N-Cl-isopropylamine to the corresponding N,N-dichloramines were found to be a second order with respect to the N-chloramine. The influence of amine concentration, pH, buffers, ionic strength, and temperature were also studied. The observed influence of pH supports a reaction mechanism which allowed estimation of the protonation constants of the chloramines studied. The influence of buffers, which was studied for both the above chloramines and N-Cl-3-aminopropanol, reflects general acid catalysis, for which a mechanism is proposed. Bronsted's equation was fitted to the catalytic constants obtained therefrom so as to estimate the values of the parameter alpha for these three N-chloramines.