Chemical Review and Letters

The Impact of Mixed Solvent on Protonation Equilibria of Mercaptosuccinic Acid in Ethylene Glycol–Water Media

Document Type : Research Article

Authors

Rama Swamy G. 1
PRUDHVI RAJU NADIMPALLI 2
G. Manikandan 3
Vijaya Kumar N 4

1 Department of Basic Science, Vishnu Institute of Technology (A), Bhimavaram, AP, India

2 Department of Chemistry, B.V.RAJU College, Bhimavaram, AP, India

3 Department of Chemistry, Thiru Kolanjiappar Govt. Arts College, Vriddhachalam, TN, India

4 Department of Chemistry, DNR Degree College (A), Bhimavaram, AP, India

https://doi.org/10.22034/crl.2024.414445.1243
Abstract
The protonation constants values of mercaptosuccinic acid were determined in ethylene glycol and water media (0-60% v/v) at 303.0 K at ionic strength of 0.16 M using pH metric technique. The protonation constants were calculated with the computer program MINIQUAD 75 and selection of the best fit chemical models were arrived based on the statistical parameters. the log K values were found to increase with increase of the organic solvent content. The linear variations of the protonation constants with the reciprocal of the dielectric constant of the medium have been attributed to the dominance of electrostatic forces. Distribution of species, protonation equilibria and effect of influential parameters on the protonation constants has also been reported.

Keywords

Mercapto succinic acid
MINIQUAD75
Protonation constant
dielectric constant

Subjects

  • Receive Date 02 September 2023
  • Revise Date 03 January 2024
  • Accept Date 03 January 2024

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