Solubility Measurement, Modeling, and Solvent Effect of 4,4′-Dimethoxybenzophenone in Ten Monosolvents and in Three Binary Solvent Mixtures from 293.15 to 333.15 K

We have determined the solubility of 4,4 '-dimethoxybenzophenone (DMBP) in ten monosolvents and three binary solvent mixtures at temperatures ranging from 293.15 to 333.15 K and at atmospheric pressure. The solubility of DMBP in both monosolvents and binary solvent mixtures increases with temperature. The solubility of DMBP is greatest in the solvent benzene and lowest in the solvent methanol. The Apelblat equation is the most suitable equation for DMBP in both monosolvents and binary solvent mixtures, based on the results of our solubility experiment data and the data calculated by the thermodynamic models. The outcomes of the KAT-LSER model indicate that pi* and delta(H) play a prominent role in the dissolution behavior of DMBP. The mixing thermodynamic properties (Delta(mix)G, Delta H-mix, and Delta S-mix) demonstrate that the mixing process of DMBP is an entropy-increasing and spontaneous process, and whether the process absorbs heat or not is related to the properties of the solvents.