| Abstract
| - o-Iodosobenzoate (1, IBA) and 2,3-iodosonaphthoate (2, INA) in aqueous cetyltrimethylammonium chloride((CTA)Cl) micelles, as well as copper metallomicelles 14, all at pH 8, cleave phosphonothioates (11 and12), the thiophosphate parathion (10), phosphonate 13, and phosphate 4 (paraoxon). The factors for thekinetic advantages in the cleavages of 12 and parathion range from 103 to 104. Although catalytic turnoverof the iodoso reagents is not observed with the thio substrates and is slow with paraoxon, excess IBA/(CTA)Cl destroys paraoxon and parathion with reaction half-lives of 3.0 and 7.7 min, respectively, at pH8.0 and 25 °C. The cleavages of 12 and parathion by IBA or INA involve an initial hydrolytic step followedby oxidation of the sulfur-containing fragment. Cleavages of 12 and parathion by o-iodoxybenzoate (1X,IBX) in (CTA)Cl micelles are much slower than the comparable reactions mediated by IBA, INA, and 14.
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