Potentiometric study for Determination of values for Schiff bases derived from 2- acetyl pyridine with heterocyclic amines | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 54, November 2014, Pages 152-164 | ||
| Author | ||
| Dunia Butrus Toma Al-Bakzo | ||
| Abstract | ||
| Abstract The project was started by synthesis of two Schiff bases from 2- acetyl pyridine with 4- amino pyrimidine and 4- amino pyridine by a standard method . The structures of these Schiff bases had confirmed by physical method , namely by using U.V-IR spectra and melting points . The main aims of the study was the determination of two consecutive nitrilium ions ionization constants pK1 and pK2 for in each molecule simultaneously . The last was regarded an improvement in potentiometric method for determination of pKa in these molecules . Finaly factors govern , the pK1 or pK2 values in these Schiff base ,as structure of imines, temperature and mixed solvent of ethanol in the range (10_60) % in water were given and discussed. | ||
| Keywords | ||
| Ionization constant; Schiff bases; Heterocyclic ketone and amine; potentiometry | ||
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