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The α‐effect in micelles: Nucleophilic substitution reaction of p ‐nitrophenyl acetate with N ‐phenylbenzohydroxamate ion
Author(s) -
Ghosh Kallol K.,
Vaidya Jyoti,
Satnami Manmohan Lal
Publication year - 2006
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.20117
Subject(s) - chemistry , cationic polymerization , nucleophilic substitution , micelle , medicinal chemistry , catalysis , ion , nucleophile , phosphate , substitution reaction , reaction rate constant , kinetics , inorganic chemistry , nuclear chemistry , organic chemistry , aqueous solution , physics , quantum mechanics
Pseudo‐first‐order rate constants have been determined for the nucleophilic substitution reactions of p ‐nitrophenyl acetate with p ‐chlorophenoxide (4‐ClC 6 H 4 O − ) and N ‐phenylbenzohydroxamate (C 6 H 5 CON(C 6 H 5 )O − ) ions in phosphate buffer (pH 7.7) at 27°C. The effect of cationic, (CTAB, TTAB, DTAB), anionic (SDS), and nonionic (Brij‐35) surfactants has been studied. The k obs value increases upon addition of CTAB and TTAB. The effect of DTAB and other surfactants on the reaction is not very significant. The micellar catalysis and α‐effect shown by hydroxamate ion have been explained. © 2005 Wiley Periodicals, Inc. Int J Chem Kinet 38: 26–31, 2006