dc.contributor.author | Taktak, Fadime Fulya | |
dc.contributor.author | Berber, Halil | |
dc.contributor.author | Dal, Hakan | |
dc.contributor.author | Öğretir, Cemil | |
dc.date.accessioned | 2019-10-20T09:02:59Z | |
dc.date.available | 2019-10-20T09:02:59Z | |
dc.date.issued | 2011 | |
dc.identifier.issn | 0021-9568 | |
dc.identifier.uri | https://dx.doi.org/10.1021/je101076m | |
dc.identifier.uri | https://hdl.handle.net/11421/16590 | |
dc.description | WOS: 000290427200047 | en_US |
dc.description.abstract | In this study the acidity constants of a series of biologically active pyridyl Schiff bases were calculated from UV-visible spectrophotometric data at (25 +/- 0.1)degrees C. The first acidity constants (pK(a1)) of the 2-[2-aza-2-(4-methyl(2-pyridly))vinyl]phenol (1), 2-[2-aza-2-(4-methyl(2-pyridly))vinyl]-6-nitrophenol (2), 2-[2-aza-2-(4-methyl (2-pyridly))vinyl] 4-nitrophenol (3), 2[2-aza-2-(4-methyl(2-pyridly))vinyl]-4,6-dinitrophenol (4), 2[2-aza-2-(6-methyl(2-pyridly))vinyl]phenol (5), 2-[2-aza-2-(6-methyl (2-pyridly))vinyl]-6-nitrophenol (6), 2{2-aza-2-(6-methyl (2-pyridly))vinyl]-4-nitrophenol (7), and 2-[2-aza-2-(6-methyl(2-pyridly))vinyl]-4,6-dinitrophenol (8) are found to be associated with the protonation of the phenolate oxygen. The second acidity constants (pK(a2)) are found to correspond to protonation of a pyridine nitrogen for molecules 5, 6, and 7 and oxoprotonation for molecules 1, 2, 3, 4, and 8. The third acidity constants (pK(a3)) are found to be associated with the protonation of a pyridine nitrogen for molecules 1, 3, 7, and 8 and amino protonation for molecules 2 and 5. For molecules 4 and 6, it is associated with oxo protonation. The contribution of the keto-amino tautomeric form was found to be considerably important. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | American Chemical Society | en_US |
dc.relation.isversionof | 10.1021/je101076m | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.title | Spectroscopic Determination of the Acid Dissociation Constants of Some 2-Hydroxy Schiff Base Derivatives | en_US |
dc.type | article | en_US |
dc.relation.journal | Journal of Chemical and Engineering Data | en_US |
dc.contributor.department | Anadolu Üniversitesi, Fen Fakültesi, Fizik Bölümü | en_US |
dc.identifier.volume | 56 | en_US |
dc.identifier.issue | 5 | en_US |
dc.identifier.startpage | 2084 | en_US |
dc.identifier.endpage | 2089 | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
dc.contributor.institutionauthor | Berber, Halil | |
dc.contributor.institutionauthor | Dal, Hakan | |