Kurum Yazarı "Berber, Halil" Scopus İndeksli Yayınlar Koleksiyonu İçin Listeleme
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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 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, ... -
A study on solvatochromism of some monoazo dye derivatives
Sidir, İsa; Sidir, Yadigar Gülseven; Berber, Halil; Tasal, Erol (Elsevier Science BV, 2013)The UV-vis and fluorescence spectra of four monoazo dye derivatives were investigated in the solvents with different polarities. Characterization of UV-vis electronic bands is specified by calculating charge transfer energy ... -
Study on the electronic and photophysical properties of the substitute-((2-phenoxybenzylidene)amino)phenol derivatives: Synthesis, solvatochromism, electric dipole moments and DFT calculations
Sidir, Yadigar Gülseven; Pirbudak, Gülsen; Berber, Halil; Sidir, İsa (Elsevier Science BV, 2017)In this study, new substitute-((2-phenoxybenzylidene)amino)phenol derivatives were synthesized and characterized by elemental analysis, H-1 NMR,C-13 NMR and FT-IR spectra. The absorption and fluorescence spectra of the ... -
Synthesis and theoretical study of bis(fluoroisatinato)mercury(II)
Kandemirli, Fatma; Koksoy, Baybars; Arslan, Taner; Sagdinc, Seda; Berber, Halil (Elsevier Science BV, 2009)Bis(fluoroisatinato)mercury(II) was synthesised from the reaction between 5-fluoroisatin (HFI) and mercury(II) acetate in methanol. Mercury(II) coordination with nitrogen atom of 5-fluoroisatin molecule was observed using ... -
Synthesis characterization and biological activity of mixed ligand silver(I) complex of 2-benzimidazolylurea and triphenylphosphine
Poyraz, Mehmet; Berber, Halil; Banti, Christina N.; Kourkoumelis, Nikolaos; Manos, Manolis J.; Hadjikakou, Sotiris K. (Pergamon-Elsevier Science LTD, 2017)The treatment with triphenylphosphine (TPP) in DMF solution of the white precipitation derived from the reaction of silver(I) nitrate with 2-benzimidazolylurea (BZIMU) results in the [Ag(TPP)(2)(BZIMU)NO3] (1) complex. The ... -
Synthesis of some alkylaminothiophene derivatives from 3,4-dibromothiophene and their theoretical calculations
Ermiş, Emel; Berber, Halil; Güllü, Mustafa (Elsevier Ltd, 2019)In this study, the copper catalyzed amination reactions of 3,4-dibromothiophene with some primary, cyclic and acyclic secondary amines were investigated to prepare novel electron rich-thiophenes which are expected to be ... -
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, ... -
Synthesis, crystal structure, optical and electrochemical properties of novel diphenylether-based formazan derivatives
Türkoğlu, Gülsen; Berber, Halil; Kani, İbrahim (Royal Soc Chemistry, 2015)In this study, formazans 5a-5h were synthesized by coupling the reactions of substituted phenylhydrazone compounds 3a-3h with diazonium salt of 4-chloro-2-phenoxybenzenamine (4). The substituted phenylhydrazones 3a-3h were ... -
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 ... -
UV-spectral changes for some azo compounds in the presence of different solvents
Sidir, Yadigar Gülseven; Sidir, İsa; Berber, Halil; Tasal, Erol (Elsevier Science BV, 2011)The electronic absorption spectra of four azo dyes with different substituents (such as Cl, I, OH) are determined at room temperature in twenty-one solvents with different polarities. The electronic transitions of azo dyes ...