The α-effect in micelles: Nucleophilic substitution reaction of p-nitrophenyl acetate with N-phenylbenzohydroxamate ion

✍ Scribed by Kallol K. Ghosh; Jyoti Vaidya; Manmohan Lal Satnami

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 118 KB
• Volume: 38
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.20117

✦ Synopsis

Abstract

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