Kinetics of Cleavage of Paraoxon and Parathion by Cetyltrimethylammonium Iodosobenzoate

Micellar cetyltrimethylammonium iodosobenzoate, (CTA)IBA, is highly reactive toward paraoxon ( 1 ) and parathion ( 2 ). In aqueous solution at pH 9, excess (CTA)IBA mediates their hydrolyses with k obs (max) = 0.014 and 0.0030 s - 1, respectively, corresponding to half-lives of 50 s and 3.8 min. Comparisons with other phosphorolytic reagents suggest that (CTA)IBA merits serious consideration for the remediation of paraoxon or parathion contamination.