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IJC-A Vol.48A(06) [June 2009] >

Title: Kinetic assessment of relative counterion penetration into cationic micelles: Effects of inert salt on the rate of piperidinolysis of phenyl salicylate in alkaline cationic micellar medium
Authors: Khan, M Niyaz
Ismail, Emran
Keywords: Kinetics
Reaction mechanisms
Micellar reactions
Counterion penetration
Micellar penetration
Issue Date: Jun-2009
Publisher: CSIR
IPC CodeInt. Cl.8 C07B41/00
Abstract:  Pseudo-first order rate constants for piperidinolysis of ionized phenyl salicylate, obtained at 0.1 M piperidine, constant concentration of CTABr micelles and varying values of [NaOC6H4CO2Na], follow the empirical relationship: kobs = (k0 + q KX/S[MX])/(1 + KX/S[MX]), where q and KX/S are empirical constants, MX = NaOC6H4CO2Na and k0 = kobs at [MX] = 0. The values of q and KX/S are explained in terms of pseudophase micellar model coupled with an empirical relationship: KS = KS0/(1 + KX/S[MX]), where KX/S is an empirical constant and KS and KS0 are CTABr micellar binding constants of PS- (i.e., S = PS-) in the presence and absence of MX, respectively.
Page(s): 781-787
ISSN: O975-0975 (Online); 0376-4710 (Print)
Source:IJC-A Vol.48A(06) [June 2009]

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