Thermodynamic Study on Ionization Constant (Ka) Values for Some Imines derived from p,o-Aminobenzaldehydes and Cinnaldehyde by Conductance Method supported by Theoretical Studies

The synthesis of three imines derivatives from various aliphatic and aromatic aldehydes was achieved by standard methods. The main objective of the study was the estimation of Ka values for these imines using conductivity method in a range (293-333) K and to deal with thermodynamic parameters namely ΔG, ΔH, ΔS. The values of ionization constant of these imines under study were calculated. Based on AM1 and PM3 semiempirical methods, εHOMO, εLUMO, band gap Eg, hardeness η, chemical potential μ, softness S, electronegativity χ, elechtrophilicity ω and amount of charge transfer ΔN in electron volt (ev) for three imines derivatives.