Effect of Solvent on Protonation Equilibria of L-Proline and L-Valine in 1, 2-Propanediol-Water Mixtures
Protonation equilibria of L-proline and L-valine in varying compositions (0.0-60.0% v/v) of 1, 2-Propanediol-water mixtures were investigated pH-metrically. Titrations were performed at 303.0 K and the ionic strength of the medium was maintained at 0.16 mol L-1 using sodium chloride. The best fit ch...
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| Language: | English |
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Wiley
2012-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2012/289074 |
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| author | P. Bhushanavathi B. Veeraswamy G. Nageswara Rao U. Viplavaprasad |
| author_facet | P. Bhushanavathi B. Veeraswamy G. Nageswara Rao U. Viplavaprasad |
| author_sort | P. Bhushanavathi |
| collection | DOAJ |
| description | Protonation equilibria of L-proline and L-valine in varying compositions (0.0-60.0% v/v) of 1, 2-Propanediol-water mixtures were investigated pH-metrically. Titrations were performed at 303.0 K and the ionic strength of the medium was maintained at 0.16 mol L-1 using sodium chloride. The best fit chemical models of the protonation equilibria were based on crystallographic R-factor, Χ2, skewness, and kurtosis. All the protonation constants of proline and valine increased with increasing propanediol content. This is attributed to the dielectric constant of the medium. |
| format | Article |
| id | doaj-art-d4782f623abf486183d4d80e50e9be28 |
| institution | DOAJ |
| issn | 0973-4945 2090-9810 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | E-Journal of Chemistry |
| spelling | doaj-art-d4782f623abf486183d4d80e50e9be282025-08-20T03:23:47ZengWileyE-Journal of Chemistry0973-49452090-98102012-01-019251752410.1155/2012/289074Effect of Solvent on Protonation Equilibria of L-Proline and L-Valine in 1, 2-Propanediol-Water MixturesP. Bhushanavathi0B. Veeraswamy1G. Nageswara Rao2U. Viplavaprasad3School of Chemistry, Andhra University, Visakhapatnam-530003, IndiaSchool of Chemistry, Andhra University, Visakhapatnam-530003, IndiaSchool of Chemistry, Andhra University, Visakhapatnam-530003, IndiaSchool of Chemistry, Andhra University, Visakhapatnam-530003, IndiaProtonation equilibria of L-proline and L-valine in varying compositions (0.0-60.0% v/v) of 1, 2-Propanediol-water mixtures were investigated pH-metrically. Titrations were performed at 303.0 K and the ionic strength of the medium was maintained at 0.16 mol L-1 using sodium chloride. The best fit chemical models of the protonation equilibria were based on crystallographic R-factor, Χ2, skewness, and kurtosis. All the protonation constants of proline and valine increased with increasing propanediol content. This is attributed to the dielectric constant of the medium.http://dx.doi.org/10.1155/2012/289074 |
| spellingShingle | P. Bhushanavathi B. Veeraswamy G. Nageswara Rao U. Viplavaprasad Effect of Solvent on Protonation Equilibria of L-Proline and L-Valine in 1, 2-Propanediol-Water Mixtures E-Journal of Chemistry |
| title | Effect of Solvent on Protonation Equilibria of L-Proline and L-Valine in 1, 2-Propanediol-Water Mixtures |
| title_full | Effect of Solvent on Protonation Equilibria of L-Proline and L-Valine in 1, 2-Propanediol-Water Mixtures |
| title_fullStr | Effect of Solvent on Protonation Equilibria of L-Proline and L-Valine in 1, 2-Propanediol-Water Mixtures |
| title_full_unstemmed | Effect of Solvent on Protonation Equilibria of L-Proline and L-Valine in 1, 2-Propanediol-Water Mixtures |
| title_short | Effect of Solvent on Protonation Equilibria of L-Proline and L-Valine in 1, 2-Propanediol-Water Mixtures |
| title_sort | effect of solvent on protonation equilibria of l proline and l valine in 1 2 propanediol water mixtures |
| url | http://dx.doi.org/10.1155/2012/289074 |
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