title: Quantum chemical studies on protonation of some substituted thiazole derivatives.
abstract: The acidity constants, pK(a) values for protonation of some substituted thiazole derivatives were calculated by using AM1 and PM3 basis sets of semi-empirical methods and B3LYP/6-31G(d) basis sets of density functional theory (DFT) calculated physical and thermodynamic parameters. Correlation search among the experimental and calculated acidity constants, pK(a) values, revealed that the best correlation exist between the experimental and ab initio calculated pK(a) values with a regression of R(2)=0.98.
authors.affiliation: Osamangazi University, Faculty of Arts and Sciences, Chemistry Department, 26040 Eskişehir, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Güray
authors.forename: E
authors.initials: E
authors.lastname: Açikkalp
authors.forename: C
authors.initials: C
authors.lastname: Oğretir
authors.forename: S
authors.initials: S
authors.lastname: Yarligan
mesh_terms: D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D015394:Molecular Structure; D011522:Protons; D011789:Quantum Theory; D013816:Thermodynamics; D013844:Thiazoles / Q000737:chemistry*
chemical_list: D011522:Protons; D013844:Thiazoles