Master of Science
Department of Chemistry
Khawaja, Barkat A., Solvent effects on the thermodynamic functions of dissociation of anilines and phenols, Master of Science thesis, Department of Chemistry, University of Wollongong, 1982. http://ro.uow.edu.au/theses/2628
For a systematic series of phenols and some a n i l i n e s , the thermodynamic functions of proton dissociation have been determined i n a 50 weight per cent water-methanol solvent system. The technique used was the e.m.f.-spectrophotometric method» The results obtained have been compared against those obtained for the same compounds in water solvent alone. For phenols, the change i n free energy on t r a n s f e r r i n g from water to the mixed solvent system has been found to arise from a change i n entropy - and therefore to a change in solvation - assuming entropy e f f e c t s are p r i m a r i l y due to solvation e f f e c t s. In the case of a n i l i n e s , solvation e f f e c t s are minor, because of no anion s o l v a t i o n , both i n water and mixed solvent systems.