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...
| Main Authors: | , |
|---|---|
| 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 |
| _version_ | 1825930588798844928 |
|---|---|
| author | Lajis, Md. Nordin Khan, Mohammad Niyaz |
| author_facet | Lajis, Md. Nordin Khan, Mohammad Niyaz |
| author_sort | Lajis, Md. Nordin |
| collection | UPM |
| 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. |
| first_indexed | 2024-03-06T09:13:51Z |
| format | Article |
| id | upm.eprints-51743 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-09-25T03:35:04Z |
| publishDate | 1998 |
| publisher | John Wiley & Sons |
| record_format | dspace |
| spelling | 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 |
| spellingShingle | Lajis, Md. Nordin Khan, Mohammad Niyaz Effects of ionic and non-ionic micelles on rate of hydroxide ion-catalyzed hydrolysis of securinine |
| title | 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_short | 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 |
| 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 |
| work_keys_str_mv | AT lajismdnordin effectsofionicandnonionicmicellesonrateofhydroxideioncatalyzedhydrolysisofsecurinine AT khanmohammadniyaz effectsofionicandnonionicmicellesonrateofhydroxideioncatalyzedhydrolysisofsecurinine |