NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.46A [2007] >
IJC-A Vol.46A(06) [June 2007] >

Title: Kinetics and mechanism of the nucleophilic ring opening of oxazolinone in mixed aqueous solvents
Authors: Ismail, Amel M
Issue Date: Jun-2007
Publisher: CSIR
Abstract: Solvent effect on the kinetics of ring opening of oxazolinone has been investigated in neutral and alkaline medium in dioxan-water mixtures up to 50% v/v in the temperature range of 40-60ºC. The thermodynamic activation parameters have been calculated and discussed in terms of solvation effect. The isokinetic temperature in both media (310, 303 and 298 K for neutral, alkaline hydrolysis by NaOH and Na₂CO₃ respectively) indicates that the reaction is entropy controlled and that solute-solvent interactions play an important role. The correlation of logk₂ against either Grunwald-Wientien Y values or log[H₂O] was found to be linear, while the correlation between logk₂ and the reciprocal of the dielectric constant was non-linear. The estimated value of the slope m in Grunwald relationship gives a value less than unity indicating SAN/SN² mechanism. Mechanism for the oxazolinone ring opening has been proposed.
Page(s): 916-922
ISSN: 0376-4710
Source:IJC-A Vol.46A(06) [June 2007]

Files in This Item:

File Description SizeFormat
IJCA 46A(6) (2007) 916-922.pdf227.2 kBAdobe PDFView/Open
 Current Page Visits: 106 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 167015 since 01-Sep-2015  Last updated on 28-Jun-2016Webmaster: