caa a22 4500 467919232 CHVBK 20180406152911.0 cr unu---uuuuu 170328e20060601xx s 000 0 eng 10.1007/s00706-005-0477-6 doi (NATIONALLICENCE)springer-10.1007/s00706-005-0477-6 Solute-Solvent Interaction Effects on Protonation Equilibrium of Substituted N -Benzylidene-2-hydroxyanilines in Aqueous Ethanol: The Application of Factor Analysis to Solvatochromic Parameters and Protonation Equilibria [Elektronische Daten] [Yüksel Altun, Fitnat Köseoğlu] Summary.: In this study, the stoichiometric protonation constants, logKOH and logKNH, of sixteen substituted N-benzylidene-2-hydroxyanilines have been determined potentiometrically in ethanol-water mixtures of varying composition (10-80% ethanol by volume) at 25.0±0.1°C. The values of the constants, logK, were submitted to factor analysis in order to obtain the number of factors which affect the variation of the whole data sets of protonation constants and, afterwards, to target factor analysis to identify these factors. The influence of solvatochromic parameters in the interactions between Schiff bases derivatives and the solvent studied was identified and quantified. Kamlet and Taft general equations allow calculation of the logK values of Schiff bases studied in any ethanol-water mixtures up to 80% (v/v) and thus provide the knowledge of the acid-base behaviour in these solvent media. Further, the quasi-lattice quasi-chemical (QLQC) theory of preferential solvation has been applied to quantify the preferential solvation by water of electrolytes in ethanol-water mixtures. Springer-Verlag, 2006 Keywords. Schiff bases nationallicence Protonation constants nationallicence Solvatochromic parameters nationallicence Factor analysis nationallicence Preferential solvation nationallicence Altun Yüksel Department of Chemistry, Faculty of Gazi Education, Gazi University, Ankara, Turkey aut Köseoğlu Fitnat Department of Chemistry, Faculty of Gazi Education, Gazi University, Ankara, Turkey aut Monatshefte für Chemie / Chemical Monthly Springer-Verlag 137/6(2006-06-01), 703-716 0026-9247 137:6<703 2006 137 706 https://doi.org/10.1007/s00706-005-0477-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00706-005-0477-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Altun Yüksel Department of Chemistry, Faculty of Gazi Education, Gazi University, Ankara, Turkey aut NATIONALLICENCE 700 1- Köseoğlu Fitnat Department of Chemistry, Faculty of Gazi Education, Gazi University, Ankara, Turkey aut NATIONALLICENCE 773 0- Monatshefte für Chemie / Chemical Monthly Springer-Verlag 137/6(2006-06-01), 703-716 0026-9247 137:6<703 2006 137 706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer