International Journal of Science and Research (IJSR)

International Journal of Science and Research (IJSR)
Open Access | Fully Refereed | Peer Reviewed

ISSN: 2319-7064


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Research Paper | Chemistry | India | Volume 5 Issue 7, July 2016


Influence of Dielectric Constant on Protonation Equilibria of Phenylalanine and Maleic Acid in Ethylene Glycol-Water Mixtures

T. Sreevaram, A. V. R. Gajapathi Raju, N. Vijaya Kumar, B. B. V. Sailaja


Abstract: The influence of dielectric constant of medium on protonation equilibria has been studied by determining protonation constants of Phenylalanine and Maleic acid pH metrically in various concentrations (0-60 %v/v) of ethylene glycol-water mixtures, at an ionic strength of 0.16 mol L-1 and at 303.0 K. MINIQUAD75 computer program has been used for the calculation of protonation constants. Linear and non-linear variations of step-wise protonation constants with reciprocal of dielectric constant of the solvent mixtures have been attributed to the dominance of the electrostatic and non-electrostatic forces, respectively. The trend is explained on the basis of solute-solute and solute-solvent interactions, solvation, proton transfer processes and dielectric constants of the media.


Keywords: constants, Phenylalanine, Maleic acid, Ethylene glycol, MINIQUAD75


Edition: Volume 5 Issue 7, July 2016,


Pages: 2203 - 2207


How to Cite this Article?

T. Sreevaram, A. V. R. Gajapathi Raju, N. Vijaya Kumar, B. B. V. Sailaja, "Influence of Dielectric Constant on Protonation Equilibria of Phenylalanine and Maleic Acid in Ethylene Glycol-Water Mixtures", International Journal of Science and Research (IJSR), https://www.ijsr.net/get_abstract.php?paper_id=ART2016759, Volume 5 Issue 7, July 2016, 2203 - 2207

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