Yazar "Öğretir, Cemil" için Fizik Bölümü listeleme
-
Frontier Orbital Theory and Chemical-Reactivity - the Utility of Spectroscopy and Molecular-Orbital Calculations
Öğretir, Cemil; Kanışkan, Nevin (Kluwer Academic Publ, 1993)… -
FTIR spectroscopic and theoretical study of the photochemistry of matrix-isolated coumarin
Kuş, Nihal; Breda, Susana; Reva, Igor; Tasal, Erol; Öğretir, Cemil; Fausto, Rui (Wiley, 2007)The infrared spectrum of monomeric unsubstituted coumarin (C9H6O2; 2H-1-benzopyran-2-one), isolated in solid argon at 10 K is presented and assigned. The UV-induced (lambda > 200 nm) unimolecular photochemistry of the ... -
Quantum chemical and experimental studies on the mechanism of alkylation of beta-dicarbonyl compounds. The synthesis of five and six membered heterocyclic spiro derivatives
Sadıkov, N; Nasibov, A; Öğretir, Cemil; Berber, Halil; Hüseyinli, A (MDPI, 2004)The alkylation of beta-dicarbonyl compounds in a K2CO3/DMSO system was found to afford O- and C-alkylated derivatives, depending on the type of the P-dicarbonyl compound involved. The alkyl derivatives obtained were used ... -
Quantum chemical studies on some 1,2,4-triarylsubstituted imidazoles
Öğretir, Cemil; Berber, Halil (Elsevier Science BV, 2002)The geometries, proton affinities and thermodynamic properties of some 1,2,4-triarylsubstituted imidazole derivatives were calculated with full geometry optimization using AM1 and PM3 methods in aqueous phase. A possible ... -
Solvatochromic effect studies on the absorption spectra of 4-((2-ethylphenyl)diazenyl)benzene-1,3-diol and 2-((2-ethylphenyl)diazenyl)benzene-1,3,5-triol molecules
Gülseven, Yadigar; Tasal, Erol; Sidir, İsa; Güngör, Tayyar; Berber, Halil; Öğretir, Cemil (Pergamon-Elsevier Science LTD, 2009)The electronic absorption spectra of 4-((2-ethylphenyl)diazenyl)benzene-1,3-diol and 2((2-ethylphenyl)diazenyl)benzene-1,3,5-triol molecules in the nine different solvent variable electronic characters have been recorded. ... -
Spectroscopic determination of acid dissociation constants of some imidazole derivatives
Öğretir, Cemil; Berber, Halil; Asutay, O (American Chemical Society, 2001)The acid dissociation constants, pK(a), of eight biologically active imidazole derivatives were determined using a spectroscopic technique. Using the obtained acid dissociation constants, attempts were made to elucidate ... -
Spectroscopic Determination of Acid Dissociation Constants of Some Novel Drug Precursor 6-Acylbenzothiazolon Derivatives
Sidir, Yadigar Gülseven; Sidir, İsa; Berber, Halil; Tasal, Erol; Öğretir, Cemil (American Chemical Society, 2010)The acid dissociation constants, as pK(a) values, of eight drug precursor 6-acylbenzothiazolon derivatives were determined using UV-vis spectroscopic technique. The protonation and deprotonation behaviors of the investigated ... -
Spectroscopic determination of acid dissociation constants of some pyridyl Shiff bases
Öğretir, Cemil; Dal, Hakan; Berber, Halil; Taktak, Fadime Fulya (American Chemical Society, 2006)The acid dissociation constants (pK(a)) of eight biologically active pyridyl Shiff bases were determined using a UV-vis spectroscopic technique at 25 +/- 0.1 degrees C. The first acidity constants (pK(a1)) of the ... -
Spectroscopic determination of acid dissociation constants of some pyridyl-substituted 2-aminothiazole derivatives
Öğretir, Cemil; Demirayak, Şeref; Tay, Naime Funda (American Chemical Society, 2006)The acid dissociation constants, K-a, of nine biologically active 2-amino-4-(x-pyridyl)- thiazole, 2-methylimino-3-methyl- 4-(x-pyridyl)- 2,3-dihydrothiazole, and 2-methylamino-4-(x-pyridyl)- 2,3-dihydrothiazole were ... -
Spectroscopic determination of acidity constants of some monoazo resorcinol derivatives
Berber, Halil; Öğretir, Cemil; Lekesiz, Emine Çiğdem Sev; Ermiş, Emel (American Chemical Society, 2008)The acidity constants, as pK(a) values, of six monoazo resorcinol derivatives were determined by the UV-visible spectroscopic technique at 25 degrees C (+/- 0.1 degrees C). The protonation and deprotonation behaviors of ... -
Spectroscopic Determination of the Acid Dissociation Constants of Some 2-Hydroxy Schiff Base Derivatives
Taktak, Fadime Fulya; Berber, Halil; Dal, Hakan; Öğretir, Cemil (American Chemical Society, 2011)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 ... -
Studies on solvatochromic behavior of some monoazo derivatives using electronic absorption spectra
Sidir, İsa; Tasal, Erol; Gülseven, Yadigar; Güngör, Tayyar; Berber, Halil; Öğretir, Cemil (Pergamon-Elsevier Science LTD, 2009)The electronic absorption spectra of 2',4'-dihydroxy-2-methoxyazobenzene and 4,2',4'-trihydroxyazobenzene molecules have been investigated in solvents with different polarities. The solvent dependent UV-vis spectral shifts, ... -
Synthesis, characterization, tautomerism and theoretical study of some new Schiff base derivatives
Türkoğlu, Gülsen; Berber, Halil; Dal, Hakan; Öğretir, Cemil (Pergamon-Elsevier Science LTD, 2011)New Schiff base derivatives were prepared by the condensation of 5-chloro and 5-bromo salicylaldehyde with bis(o-aminophenol)ethers. Five bis(o-nitrophenol)ether compounds were synthesized using some ditosylate, ... -
A theoretical search on metal-ligand interaction mechanism in corrosion of some imidazolidine derivatives
Öğretir, Cemil; Çalış, S; Bereket, G; Berber, Halil (Elsevier Science BV, 2003)The interaction mechanism of some imidazolidine derivatives with metallic Zn in gas phase, using semiempirical methods, was studied at elevated temperature and the obtained data were used to search a possible correlation ... -
Theoretical studies on the structure of [(1-aza-2-benzimidazol-2-ylprop-1-enyl)amino]aminomethane-1-thione
Poyraz, Mehmet; Berber, Halil; Öğretir, Cemil (Arkat Usa Inc, 2007)The tautomerisation and acid-base properties of [(1-aza-2-benzimidazol-2-ylprop-1-enyl) amino]aminomethane-1-thione were studied both in the gas and aqueous phase to elucidate the structure of this compound. The computed ... -
A theoretical study of substituent effects on tautomerism of 2-hydroxybenzimidazoles
Öğretir, Cemil; Yarlıgan, S; Berber, Halil; Arslan, T; Topal, S (Springer-Verlag, 2003)The geometries, relative stabilities of some 4(7) and 5(6) substituted 2-hydroxybenzimidazole derivatives were calculated with full geometry optimization using AM1 and PM3 in aqueous phase. With the exception of molecules ...