A Potentiometric Investigation of Primary Amines in Non-aqueous Media

Abstract

Titration of weak bases in non-aqueous solvents can provide valuable information about these weak bases. Some primary amines; 1-aminobutane, 1-aminopropane, 2-aminoheptane, aminocyclohexane, 3-amino-1-phenylbutane were titrated with hydrochloric acid in toluene solvent. All the primary amines gave very well-shaped potentiometric titration curves. The same titrations were done with hydrochloric acid in methanol solvent to show the effect of amphiprotic solvent in the titrations with hydrochloric acid. As a result, toluene is a suitable solvent for titrating some of the primary amines potentiometrically with hydrochloric acid.