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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 28, Number 7
BKCSDE 28(7)
July 20, 2007

Title	A Comparative Analysis of Pseudophase Ion-Exchange (PIE) Model and Berezin Pseudophase (BPP) Model: Analysis of Kinetic Data for Ionic Micellar-mediated Semi-ionic Bimolecular Reaction
Author	May-Ye Cheong, Azhar Ariffin, M. Niyaz Khan*
Keywords	N-Benzylphthalimide, Rate constant, Binding constant, Pseudophase ion-exchange (PIE) model, Berezin pseudophase (BPP) model
Abstract	Pseudo-first-order rate constants (k_obs) for the reaction of N-benzylphthalimide (NBPT) with HO^- have been determined at 2.0 × 10^?4 M NBPT, 1.0 × 10^?3 and 2.0 × 10^?3 M NaOH as well as varying concentrations of cetyltrimethylammonium bromide ([CTABr]_T = 0.0-1.7 × 10^?1 M). The effects of [CTABr]_T ? CMC (with CMC representing the critical micelle concentration of CTABr) on k_obs have been analyzed in terms of Berezin’s pseudophase (BPP) model and pseudophase ion-exchange (PIE) model. Although both models give the best observed data fit with least-squares values not significantly different from each other, the calculated values of K_S from BPP model appear to be more reliable compared to those from PIE model because the values of K_S from BPP model are similar to the corresponding KS values determined spectrophotometrically.
Page	1135 - 0
Full Text	PDF

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