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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(1) [January 2005] >
| Title: | Mechanistic studies of saponification of some mono- and di-esters of carboxylic acids through iso-kinetic relationships (ΔH≠ vs. ΔS≠) in protic and aprotic solvent systems |
| Authors: | Rao, B M
Gajanan, K |
| Keywords: | Saponification
monoesters
diesters
mechanism |
| Issue Date: | Jan-2005 |
| Publisher: | CSIR |
| IPC Code: | C07C 27/02 |
| Abstract: | The mechanism of
saponification of structurally related and industrially important mono- and
diesters in protic and aprotic solvent systems have been investigated. Time
ratio method and Swain's standard data for series first order reactions have
been utilized for the evaluation of rate data and thermodynamic parameters viz.
ΔE≠, -ΔH≠, ΔG≠, ΔS≠ and logA for the steps which involve the competitive and
consecutive saponification reactions. Further, the enthalpy-entropy
correlations are used to establish the plausible mechanism of saponification
process for the esters. Comparative study of the slopes of linear plots (ΔH≠ vs. ΔS≠) reveal that dilaurates
undergo faster saponification process than distearates and oleostearates
irrespective of any solvent sytems. The experimental plots (ΔH≠ vs. ΔS≠) support a faster
saponification process of mono esters than diesters in all the protic and
aprotic solvent systems studied. |
| Page(s): | 43-49 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.12(1) [January 2005]
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