Mechanistic studies of the Carbonate Esters hydrolysis catalized by imidazole.
DOI:
https://doi.org/10.5433/1679-0375.2000v21n4p59Keywords:
reaction mechanisms, chemical kinetics, carbonates.Abstract
Kinetic and mechanistic aspects of the imidazole-catalzed hydrolysis of p-nitrophenyl p-X-phenyl carbonates (X = MeO, Me, H, CI, CN, N02, series I) and bis (p-X-phenyl) carbonates (X = MeO, Me, H, Ci, N02, series II) were examined. Based on catalytic rate constants, activation parameters, kinetic solvent isotope effects, Hammett's r values, the following conclusions were reached: a) imidozole acts as nucleophilic catalyzer; b) the abandon group is a neutral phenol; c) the limiting rate step is the decomposition of the tetrahedral intermediate that precedes the p-X-phenoxycarbonylimidazole.
Metrics
Downloads
Published
How to Cite
Issue
Section
License
The Copyright Declaration for articles published in this journal is the author’s right. Since manuscripts are published in an open access Journal, they are free to use, with their own attributions, in educational and non-commercial applications. The Journal has the right to make, in the original document, changes regarding linguistic norms, orthography, and grammar, with the purpose of ensuring the standard norms of the language and the credibility of the Journal. It will, however, respect the writing style of the authors. When necessary, conceptual changes, corrections, or suggestions will be forwarded to the authors. In such cases, the manuscript shall be subjected to a new evaluation after revision. Responsibility for the opinions expressed in the manuscripts lies entirely with the authors.
This journal is licensed with a license Creative Commons Attribution-NonCommercial 4.0 International.
