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Effects of ionic and non-ionic micelles on rate of hydroxide ion-catalyzed hydrolysis of securinine

The effects of micelles of cetyltrimethylammonium bromide (CTABr), tetradecyltrimethylammonium bromide (TTABr), sodium dodecyl sulfate (SDS) and polyoxyethylene 10 lauryl ether (C12E10) on the rates of alkaline hydrolysis of securinine were studied at a constant [−OH] (0.05 M). An increase in the to...

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Main Authors: Lajis, Md. Nordin, Khan, Mohammad Niyaz
Format: Article
Language:English
English
Published: John Wiley & Sons 1998
Online Access:http://psasir.upm.edu.my/id/eprint/51743/1/51743.pdf
http://psasir.upm.edu.my/id/eprint/51743/7/J%20of%20Physical%20Organic%20Chem%20-%201998%20-%20Lajis%20-%20Effects%20of%20ionic%20and%20non%E2%80%90ionic%20micelles%20on%20rate%20of%20hydroxide%20ion%E2%80%90catalyzed.pdf
http://psasir.upm.edu.my/id/eprint/51743/
http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1099-1395(199803)11:3%3C209::AID-POC995%3E3.0.CO;2-T/abstract?systemMessage=Wiley+Online+Library+will+be+unavailable+on+Saturday+12th+August+at+3%3A00+EDT+%2F+8%3A00+BST+%2F+12%3A30+IST+%2F+15%3A00+SGT+for+
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spelling my.upm.eprints.517432024-08-05T04:14:41Z http://psasir.upm.edu.my/id/eprint/51743/ Effects of ionic and non-ionic micelles on rate of hydroxide ion-catalyzed hydrolysis of securinine Lajis, Md. Nordin Khan, Mohammad Niyaz The effects of micelles of cetyltrimethylammonium bromide (CTABr), tetradecyltrimethylammonium bromide (TTABr), sodium dodecyl sulfate (SDS) and polyoxyethylene 10 lauryl ether (C12E10) on the rates of alkaline hydrolysis of securinine were studied at a constant [−OH] (0.05 M). An increase in the total concentrations of CTABr, TTABr, SDS and C12E10 from 0.0 to 0.2 M causes a decrease in the observed pseudo-first-order rate constants (kobs) by factors of ca 2.5, 3, 7 and 4, respectively. The observed data are explained in terms of pseudophase and pseudophase ion-exchange (PIE) models of micelle. The binding constants, KS, of securinine with SDS, C12E10, CTABr and TTABr micelles are 32.4, 14.8, 22.1, and 9.1 M−1, respectively. The magnitudes of the second-order rate constants, kM, for the reactions in the micellar pseudophase are negligible compared with the corresponding rate constant, kW, for the reaction occurring in the aqueous pseudophase for CTABr, TTABr, SDS and C12E10. John Wiley & Sons 1998 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/51743/1/51743.pdf text en http://psasir.upm.edu.my/id/eprint/51743/7/J%20of%20Physical%20Organic%20Chem%20-%201998%20-%20Lajis%20-%20Effects%20of%20ionic%20and%20non%E2%80%90ionic%20micelles%20on%20rate%20of%20hydroxide%20ion%E2%80%90catalyzed.pdf Lajis, Md. Nordin and Khan, Mohammad Niyaz (1998) Effects of ionic and non-ionic micelles on rate of hydroxide ion-catalyzed hydrolysis of securinine. Journal of Physical Organic Chemistry, 11 (3). pp. 209-215. ISSN 0894-3230; ESSN: 1099-1395 http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1099-1395(199803)11:3%3C209::AID-POC995%3E3.0.CO;2-T/abstract?systemMessage=Wiley+Online+Library+will+be+unavailable+on+Saturday+12th+August+at+3%3A00+EDT+%2F+8%3A00+BST+%2F+12%3A30+IST+%2F+15%3A00+SGT+for+ 10.1002/(SICI)1099-1395(199803)11:3<209::AID-POC995>3.0.CO;2-T
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description The effects of micelles of cetyltrimethylammonium bromide (CTABr), tetradecyltrimethylammonium bromide (TTABr), sodium dodecyl sulfate (SDS) and polyoxyethylene 10 lauryl ether (C12E10) on the rates of alkaline hydrolysis of securinine were studied at a constant [−OH] (0.05 M). An increase in the total concentrations of CTABr, TTABr, SDS and C12E10 from 0.0 to 0.2 M causes a decrease in the observed pseudo-first-order rate constants (kobs) by factors of ca 2.5, 3, 7 and 4, respectively. The observed data are explained in terms of pseudophase and pseudophase ion-exchange (PIE) models of micelle. The binding constants, KS, of securinine with SDS, C12E10, CTABr and TTABr micelles are 32.4, 14.8, 22.1, and 9.1 M−1, respectively. The magnitudes of the second-order rate constants, kM, for the reactions in the micellar pseudophase are negligible compared with the corresponding rate constant, kW, for the reaction occurring in the aqueous pseudophase for CTABr, TTABr, SDS and C12E10.
format Article
author Lajis, Md. Nordin
Khan, Mohammad Niyaz
spellingShingle Lajis, Md. Nordin
Khan, Mohammad Niyaz
Effects of ionic and non-ionic micelles on rate of hydroxide ion-catalyzed hydrolysis of securinine
author_facet Lajis, Md. Nordin
Khan, Mohammad Niyaz
author_sort Lajis, Md. Nordin
title Effects of ionic and non-ionic micelles on rate of hydroxide ion-catalyzed hydrolysis of securinine
title_short Effects of ionic and non-ionic micelles on rate of hydroxide ion-catalyzed hydrolysis of securinine
title_full Effects of ionic and non-ionic micelles on rate of hydroxide ion-catalyzed hydrolysis of securinine
title_fullStr Effects of ionic and non-ionic micelles on rate of hydroxide ion-catalyzed hydrolysis of securinine
title_full_unstemmed Effects of ionic and non-ionic micelles on rate of hydroxide ion-catalyzed hydrolysis of securinine
title_sort effects of ionic and non-ionic micelles on rate of hydroxide ion-catalyzed hydrolysis of securinine
publisher John Wiley & Sons
publishDate 1998
url http://psasir.upm.edu.my/id/eprint/51743/1/51743.pdf
http://psasir.upm.edu.my/id/eprint/51743/7/J%20of%20Physical%20Organic%20Chem%20-%201998%20-%20Lajis%20-%20Effects%20of%20ionic%20and%20non%E2%80%90ionic%20micelles%20on%20rate%20of%20hydroxide%20ion%E2%80%90catalyzed.pdf
http://psasir.upm.edu.my/id/eprint/51743/
http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1099-1395(199803)11:3%3C209::AID-POC995%3E3.0.CO;2-T/abstract?systemMessage=Wiley+Online+Library+will+be+unavailable+on+Saturday+12th+August+at+3%3A00+EDT+%2F+8%3A00+BST+%2F+12%3A30+IST+%2F+15%3A00+SGT+for+
_version_ 1806690473978363904
score 13.211869

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