Solution Thermodynamics of Benzotriazole in Different Pure Solvents

Abstract

Solubility data of benzotriazole (BTA) in 14 solvents were measured by a static gravimetric method from 268.15 to 303.15 K. The results illustrated that the solubility of BTA in N,N-dimethylacetamide is the highest whereas that in 1,2-dichloroethane is the lowest in all the tested solvents. And the values of solubility increase with increasing of temperature. Additionally, the modified Apelblat equation, the λh equation, the NRTL model, and the Wilson model were employed to correlate the experimental solubility data. It was found that all the selected thermodynamic models could give satisfactory correlation results. Furthermore, the thermodynamic properties of BTA during the dissolving process, including the enthalpy, the Gibbs energy, and the entropy, were also calculated and analyzed.

Comment on “Solution Thermodynamics of Benzotriazole in Different Pure Solvents”

“…I calculate a value of x 1 = 0.3166 for the mole fraction solubility of benzotriazole in methanol at T = 298.15 K, which is approximately 18% smaller than the back-calculated value of x 1 = 0.3888 that the authors give in the third column of Table 3 in their published paper …”

“…Finally, I calculate the solubility of benzotriazole in acetonitrile at T = 298.15 K by substituting the authors’ calculated equation coefficients ( A = −167.0; B = 484.6; C = 2.630) from Table S1 into eq above: The mole fraction solubility that I back-calculate using the authors’ tabulated curve-fit equation coefficients, x 1 = 4.49 × 10 –70 , is nowhere close to the value of x 1 = 0.09686 that the authors give in Table 3 of their published paper for the solubility of benzotriazole in acetonitrile. The only way that I can come close to the authors’ back-calculated value is to assume that both the B and C were off by a factor of ten.…”

“…In a recent paper published in the Journal of Chemical and Engineering Data Luan and co-workers reported the solubility of benzotriazole in 14 different organic solvents. Solubilities were determined in the temperature range from 268.15 to 303.15 K using a static gravimetric method of analyses.…”

“…Similarly, I calculate the solubility of benzotriazole in 2-butanol at T = 298.15 K by substituting the authors’ calculated equation coefficients ( A = −115.0; B = 4004; C = 17.70) from Table S1 into eq above: The mole fraction solubility that I back-calculate using the authors’ tabulated curve-fit equation coefficients, x 1 = 0.4853, is approximately 28.6% larger than the value of x 1 = 0.3772 that the authors give in Table 3 of their published paper for the solubility of benzotriazole dissolved in 2-butanol at 298.15 K.…”

Solubility Determination and Thermodynamic Properties of Bezafibrate in Pure and Binary Mixed Solvents

“…When the activity coefficient of the solute, γ i , is evaluated by Wilson equation, the resulted model is called the Wilson Model. The model can be described as eqs –. , …”