N,N-dimethylformamide+(ethanol, n-propanol or n-butanol) solvent mixtures]]>

摘要

Abstract The solubility of 3-nitrobenzaldehyde in mixed solvents of N,N-dimethylformamide + ethanol, N,N-dimethylformamide+ n-propanol and N,N-dimethylformamide+ n-butanol were determined experimentally by using the isothermal dissolution equilibrium method within the temperature range from (273.15 to 298.15) K under 101.2kPa. The mole fraction solubility of 3-nitrobenzaldehyde increased with increasing temperature and mass fraction of the N,N-dimethylformamide (DMF). At the same temperature and mass fraction of DMF, the mole fraction solubility of 3-nitrobenzaldehyde in ethanol was greater than those in the other two systems. The obtained solubilities were correlated by employing Jouyban-Acree, van't Hoff-Jouyban-Acree and Apelblat-Jouyban-Acree models. The largest value of RAD was 0.30×10?2, and of RMSD, 8.10×10?4. Dissolution of 3-nitrobenzaldehyde in these mixed solvents was an endothermic process. Preferential solvation parameters of 3-nitrobenzaldehyde were also derived by means of the inverse Kirkwood-Buff integrals method. The preferential solvation parameter δx