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.