ICAR Research Data Repository for Knowledge Management
<p>Effect of [NaBr] on the rate of intramolecular base-assisted piperidinolysis of ionized phenyl salicylate in the presence of double-tail cationic surfactant aggregates: DDABr/NaBr/H<sub>2</sub>O nanoparticles catalysis</p><br />
Online Publishing @ NISCAIR
View Archive Info| Field | Value | |
| Authentication Code |
dc |
|
| Title Statement |
<p>Effect of [NaBr] on the rate of intramolecular base-assisted piperidinolysis of ionized phenyl salicylate in the presence of double-tail cationic surfactant aggregates: DDABr/NaBr/H<sub>2</sub>O nanoparticles catalysis</p><br /> |
|
| Added Entry - Uncontrolled Name |
Razak, Norazizah Abdul; Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia Fagge, Ibrahim Isah; Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia Khan, Mohammad Niyaz; Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia University of Malaya, Kuala Lumpur, Malaysia |
|
| Uncontrolled Index Term |
Kinetics, Pseudophase micellar model, Counterion binding-micellar growth, Phenyl salicylate, Piperidine, Cationic micelles, Didodecyldimethylammonium bromide |
|
| Summary, etc. |
<p style="text-align: justify;">The nucleophilic reactions of piperidine with ionized phenyl salicylate (PSa<sup>‒</sup>) reveal a nonlinear decrease with the increase in concentration of didodecyldimethylammonium bromide (DDABr) micelles (D<sub>n</sub>) at 35 °C and in the absence as well as presence of constant [NaBr]. The plots of pseudo-first-order rate constants (<em>k</em><sub>obs</sub>) versus [D<sub>n</sub>]) have been explained quantitatively in terms of pseudophase micellar model. Such a data treatment gives DDABr micellar binding constant (<em>K</em><sub>S</sub>) of PSa<sup>−</sup>. The effects of [NaBr] upon <em>K</em><sub>S</sub> is explained with an empirical relationship which provides an empirical constant (<em>K</em><sub>Br/S</sub> where S = PSa<sup>−</sup>). The magnitude of <em>K</em><sub>Br/S</sub> is the measure of the ability of ion Br<sup>−</sup> to expel the co-ion PSa<sup>−</sup> from the cationic micellar pseudophase to the bulk aqueous phase. The origin of the large catalytic effect of DDABr/NaBr/H<sub>2</sub>O nanoparticles on the rate of piperidinolysis of PSa<sup>−</sup> is described in terms of plausible physicochemical causes.</p> |
|
| Publication, Distribution, Etc. |
Indian Journal of Chemistry -Section A (IJCA) 2020-12-10 16:14:38 |
|
| Electronic Location and Access |
application/pdf http://op.niscair.res.in/index.php/IJCA/article/view/18951 |
|
| Data Source Entry |
Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 56, ##issue.no## 11 (2017): INDIAN JOURNAL OF CHEMISTRY - SECTION A |
|
| Language Note |
en |
|
| Nonspecific Relationship Entry |
http://op.niscair.res.in/index.php/IJCA/article/download/18951/57653 http://op.niscair.res.in/index.php/IJCA/article/download/18951/57654 http://op.niscair.res.in/index.php/IJCA/article/download/18951/57811 http://op.niscair.res.in/index.php/IJCA/article/download/18951/57847 http://op.niscair.res.in/index.php/IJCA/article/download/18951/57848 |
|
| Terms Governing Use and Reproduction Note |
Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India© 2015. The Council of Scientific & Industrial Research, New Delhi. |
|