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Title: Hydrolytic cleavage of paraoxon and parathion by oximate and functionalized oximate ions: A comparative study
Authors: Dewangan, Hitesh K
Kandpal, Neha
Nagwanshi, Rekha
Satnami, Manmohan L
Keywords: Surfactants;Cationic surfactants;Hydrolytic cleavage;Cleavage reactions;Paraoxon;Parathion;Oximate;Functionalized oximate
Issue Date: May-2016
Publisher: NISCAIR-CSIR, India
Abstract: Bimolecular reactions of O,O-diethyl-O-p-nitrophenylphosphate (paraoxon) and O,O-diethyl-O-p-nitrophenyl phosphorothioate (parathion) with oximate (pyridinealdoxime 2-PyOx- and 4-PyOx-) and its functionalized oximate, 4-(hydroxyimino)methyl)-1-alkylpyridinium bromide ions (alkyl = C10H21 (4-C10PyOx-); alkyl = C12H25 (4-C12PyOx-)) have been investigated in aqueous and cationic micellar media of cetylpyridinium bromide, cetyltrimethyl-ammonium bromide and cetyltetradecyltrimethylammonium bromide at pH 9.5 and 27 oC. Under the micellized condition, a 1.2×103 fold and 9.0×106 fold rate enhancement over the aqueous reaction of paraoxon (ko = 7.5×10-8 s-1) and parathion (ko = 9.5×10-11) is observed.
Page(s): 560-565
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections: IJC-A Vol.55A(05) [May 2016]

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