Thermodynamic study on pKa values of some imines and their acids conjugate derived from different aromatic carbonyl compounds | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 53, November 2014, Pages 43-55 | ||
| Authors | ||
| Dunia Pitriz Bakzo; Adel Saead Pitriz Azzouz | ||
| Abstract | ||
| Abstract The project was concerned with synthesis of mono acidic or diacidic Schiff bases having oxime or phenol groups or a combination of them respectively . Other syn and anti oximes were derived from 2-acetyl pyridine , and others included and synthesized by a standard methods . Potentiometric titration was found previously , an accurate , simple and fast method for determination of pKa for acids or pKa for acid conjugates of Schiff bases using NaOH and HCl titrant respectively . This method was applied successfully in this investigation for the determination of ionization constants of imines in a range of temperature (293-313)K . This encourage the workers in this study to deal with thermodynamic parameters such as ∆Gْ , ∆Hْ and ∆Sْ for the ionization reactions of imines at 10% ethanol solvent as interpreted and discussed . | ||
| Keywords | ||
| pKa; Aromatic imines; Schiff bases; syn or anti oximes; Thermodynamic parameters | ||
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