A SOLVENT-EXTRACTION STUDY OF THE THERMODYNAMICS OF P-FLUOROANILINE AND OF THE PROTON IONIZATION OF THE P-FLUORO ANILINIUM ION

The distribution coefficients of p-fluoroaniline between a petroleum e ther fraction and aqueous sodium chloride solutions were determined at different temperatures. The activity coefficients of the amine in aqu eous sodium chloride solutions and the salting coefficients were deter mined at different temperatures. The results conform with the Debye th eory of salt effects. The effect of sodium chloride on the proton ioni zation of the p-iodoanilinium ion was studied at different temperature s, by a modified distribution method. Attention was directed to the ch oice of the extracting solvent, the purity of the amine, and the analy tical method. K(m), K(o), (K(b))m, K(b))o, DELTAG-degree, DELTAH-degre e and DELTAS-degree were evaluated for the proton ionization of the p- fluoroanilinium ion.