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http://nopr.niscpr.res.in/handle/123456789/18272| Title: | Potentiometric studies on the protonation constants and solvation of some α-amino acid methyl- and ethyl esters in ethanol-water mixtures |
| Authors: | Dogan, Alev Koseoglu, Fitnat Kilic, Esma |
| Issue Date: | May-2002 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The stoichiometric protonati on constants of 15 esters (methyl and ethyl esters of glycine, L-alanine, L -valine, L - leucine, L -phenylalanine, L -serine, L -methionine and methyl ester of L -isoleucine) in 20-80% (v/v) ethanol-water mixtures have been determined. The effect of solvent on α -amino acid methyl- and ethyl esters have also been determined at ionic strength of 0. 1 M NaCl and at 25°C under nitrogen atmosphere. A potentiometric method is used and the calculation of the constants has been carried out using PKAS computer programme. The logarithm of the protonation constants of α-amino acid esters is found to decrease linearly with increase in ethanol contents. The variation of these constants is discussed on the basis of specific solute-solvent interactions. |
| Page(s): | 960-962 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.41A(05) [May 2002] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 41A(5) 960-962.pdf | 708.93 kB | Adobe PDF | View/Open |
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