Determination of the constants of conjugation of acidity aliphatic Schiff bases derived from benzyl and some other acids

The work is concerned with the determination of acidity for four aliphatic Schiff bases, prepared by reaction of benzyl with aliphatic nitrogen bases as ethanol amine, 1,2-ethane diamine, 1,3-propane diamine and benzoyl, in addition to dibenzamide for a comparative study. The acidities of all compounds under investigation are calculated by using the half integral potentiometric method, as founded to be simple, easy and with an accuracy of0.00l pKa unite. The acidities of all compounds are calculated at a rang of temperatures between (293-313)k.