Physical Chemistry Laboratory, Department of Chemistry, Saurashtra University, Rajkot-360005 (Gujarat), India
Abstract
The acidity constants of some synthesized protonated pyrazolo quinazoline compounds were determined potentiometrically at ionic strength of 0.1 M in DMF: water (60:40 v/v) system at different temperatures (298.15 K to 318.15 K). The pKa values have been found to increase with increasing electron-donating nature of substitutions. Some thermodynamics parameters such as enthalpy (ΔH°), Gibb’s free energy (ΔG°) and entropy (ΔS°) of reactions have also been evaluated at different temperatures for these systems. The thermodynamic parameters indicate that dissociation process is not spontaneous and exothermic.
Baluja,S , Ramavat,P and Nandha,K . (2016). Potentiometric Determination of Acidity Constants of Some Synthesized Organic Compounds in Organic-Water Media. Journal of Sciences, Islamic Republic of Iran, 27(4), 321-328.
MLA
Baluja,S , , Ramavat,P , and Nandha,K . "Potentiometric Determination of Acidity Constants of Some Synthesized Organic Compounds in Organic-Water Media", Journal of Sciences, Islamic Republic of Iran, 27, 4, 2016, 321-328.
HARVARD
Baluja S, Ramavat P, Nandha K. (2016). 'Potentiometric Determination of Acidity Constants of Some Synthesized Organic Compounds in Organic-Water Media', Journal of Sciences, Islamic Republic of Iran, 27(4), pp. 321-328.
CHICAGO
S Baluja, P Ramavat and K Nandha, "Potentiometric Determination of Acidity Constants of Some Synthesized Organic Compounds in Organic-Water Media," Journal of Sciences, Islamic Republic of Iran, 27 4 (2016): 321-328,
VANCOUVER
Baluja S, Ramavat P, Nandha K. Potentiometric Determination of Acidity Constants of Some Synthesized Organic Compounds in Organic-Water Media. J. Sci. I. R. I.. 2016;27(4):321-328.
Journal of Sciences, Islamic Republic of Iran