NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.47A [2008] >
IJC-A Vol.47A(09) [September 2008] >

Title: Kinetics of the reaction between methyl 2,4-dichloro-3,5-dinitrobenzoate and piperidine — Solvent effect
Authors: Fathalla, Magda F
Kassem, Taher S
Hamed, Ezzat A
Issue Date: Sep-2008
Publisher: CSIR
Abstract: The rate constant for the reaction of methyl 2,4-dichloro-3,5-dinitrobenzoate (1) with different piperidine concentrations have been measured spectrophotometrically in nine pure solvents, viz. methanol, ethanol, n-propanol, isopropanol, t-butyl alcohol, acetonitrile, dimethysulphoxide, dioxane and benzene at different temperatures to study the effect of the solvents. The kinetic results postulate three solvation models: (a) alkanol extensively solvating the amine and weakening the intramolecular hydrogen bonding in the intermediate; (b) the non-polar solvents enhance the intramolecular hydrogen bonding in the intermediate increasing the nucleophilicity of amine; (c) the dipolar aprotic solvents solvate the amine and timely solvating the intermediate by intermolecular hydrogen bond. The solvent parameters have been correlated with the rate constant for the reaction through linear free energy relationships. The adequacy of the multi-parametric scales as appropriate approaches to describe the solvent features in microscopic environments has also been analyzed.
Page(s): 1348-1354
ISSN: 0376-4710
Source:IJC-A Vol.47A(09) [September 2008]

Files in This Item:

File Description SizeFormat
IJCA 47A(9) 1348-1354.pdf97.84 kBAdobe PDFView/Open
 Current Page Visits: 925 
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: 165684 since 01-Sep-2015  Last updated on 27-Jun-2016Webmaster: