Journal of Chemical and Engineering Data, Vol.65, No.7, 3744-3753, 2020
y Saturated Solubility and Thermodynamic Mixing Properties of 3,5-Dibromo-4-hydroxybenzaldehyde in 16 Individual Solvents at Elevated Temperatures
This work aimed at saturated solubility of 3,5-dibromo-4-hydroxybenzaldehyde in 16 individual solvents including n-pentanol, methanol, dimethylsulfoxide (DMSO), isobutanol, ethanol, 1,4-dioxane, n-propanol, ethylene glycol (EG), isopropanol, cyclohexane, n-butanol, n-octanol, ethyl acetate, water, N,N-dimethylformamide (DMF), and acetonitrile. Experiments were performed through a saturation shake-flask method within the temperature range of 278.15-323.15 K under ambient pressure of about p = 101.2 kPa. The solubility values in mole fraction of 3,5-dibromo-4-hydroxybenzaldehyde increased as the experimental temperature increased and are ranked as: 1,4-dioxane > (DMF, n-octanol) > n-pentanol > DMSO > ethyl acetate > n-butanol > isobutanol > n-propanol > isopropanol > (ethanol, EG) > acetonitrile > methanol > cyclohexane > water. The molecular interactions of solvent-solute and solvent-solvent were examined by way of linear solvation energy relationships to show the dependence of solvent descriptors on solubility behavior. Several equations and models, e.g., Wilson, lambda h, Apelblat, and NRTL, were employed to mathematically correlate the solubility data. The obtained values of maximum root-mean-square deviation and relative average deviation were 4.191 x 10(-4) and 2.61 x 10(-2), respectively. In general, for a particular solvent, the relative average deviation values obtained with the Apelblat equation were smaller than those obtained with the other models/equation. Also, the activity coefficient and reduced excess enthalpy under the condition of infinitesimal concentration along with mixing properties were obtained using the Wilson model.