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Analysis of tautomeric equilibrium in (E)-4,6-dibromo-2-[(4-fluorophenylimino)methyl]-3-methoxyphenol compound
Kastas, Cigdem Albayrak; Kastas, Gokhan; Gur, Mahmut; Muglu, Halit; Büyükgüngör, Orhan (Pergamon-Elsevier Science Ltd, 2015)In this study, the tautomeric equilibrium between the phenol-imine and keto-amine structural forms of (E)-4,6-dibromo-2-[(4-fluorophenylimino)methyl]-3-methoxyphenol compound has been investigated with experimental (XRD, ... -
Direct and solvent-assisted thione-thiol tautomerism in 5-(thiophen-2-yl)-1,3,4-oxadiazole-2(3H)-thione: Experimental and molecular modeling study
Arslan, N. Burcu; Özdemir, Namık; Dayan, Osman; Dege, Necmi; Koparir, Metin; Koparir, Pelin; Muglu, Halit (Elsevier, 2014)The compound has been synthesized and characterized by IR, NMR and X-ray diffraction. Quantum chemical calculations at B3LYP/6-311++G(d,p) level were performed to study the molecular and spectroscopic properties, conformational ... -
Investigation of two o-hydroxy Schiff bases in terms of prototropy and radical scavenging activity
Kastas, Cigdem Albayrak; Kastas, Gokhan; Guder, Aytac; Gur, Mahmut; Muglu, Halit; Büyükgüngör, Orhan (Elsevier Science Bv, 2017)Two Schiff bases, namely (E)-4,6-dibromo-3-methoxy-2-[(phenylimino)methyl]phenol (1) and (Z)-2,4-dibromo-6-[(4-buthylphenylamino)methylene]-5-methoxycyclohexa-2,4-dienone (2), have been investigated by considering solvent, ... -
New 1,3,4-thiadiazoles based on thiophene-2-carboxylic acid: Synthesis, characterization, and antimicrobial activities
Muglu, Halit; Yakan, Hasan; Shouaib, Hanan Almabrok (Elsevier, 2020)Novel 1,3,4-thiadiazole derivatives were prepared by cyclization reaction of thiophene-2-carboxylic acid with N-arylthiosemicarbazides and POCl3. The antibacterial activities of the synthesized compounds were tested against ... -
Novel carbohydrazones including 5-substituted isatin: Synthesis, characterization, and quantum-chemical studies on the relationship between electronic and antioxidant properties
Cavus, M. Serdar; Yakan, Hasan; Muglu, Halit; Bakir, Temelkan (Pergamon-Elsevier Science Ltd, 2020)1-(5-Chloro-2-oxoindolin-3-ylidene)carbohydrazone (1), 1-(5-fluoro-2-oxoindolin-3-ylidene)carbohydrazone (2), 1-(5-methoxy-2-oxoindolin-3-ylidene)thiocarbohydrazone (3), and 1-(5-methoxy-2-oxoindolin-3-ylidene) carbohydrazone ... -
Phthalocyanines including 2-mercaptobenzimidazole analogs: Synthesis, spectroscopic characteristics, quantum-chemical studies on the relationship between electronic and antioxidant properties
Yakan, Hasan; Cavus, M. Serdar; Guzel, Emre; Arslan, Baris S.; Bakir, Temelkan; Muglu, Halit (Elsevier, 2020)In this study, peripherally tetra 2-mercaptobenzimidazole group substituted cobalt and indium phthalocyanine complexes (2 and 3) were prepared from 4-(benzo[d]imidazole-2-ylthio)phthalonitrile (1) for the first time. ... -
Synthesis and Characterization of Some New Heteroaromatic Compounds Having Chirality Adjacent to a 1,3,4-Thiadiazole Moiety and Their Antimicrobial Activities
Gur, Mahmut; Sener, Nesrin; Kastas, Cigdem A.; Ozkan, Osman Emre; Muglu, Halit; Elmaswari, Magboule A. M. (Wiley, 2017)Through a cyclization reaction of 2-phenylbutyric acid with N-phenylthiosemicarbazide and POCl3, novel 1,3,4-thiadiazole derivatives were synthesized. Their structures were confirmed using IR, H-1 NMR, and C-13 NMR ... -
Synthesis, characterization, quantum chemical calculations and antioxidant activity of new bis-isatin carbohydrazone and thiocarbohydrazone derivatives
Muglu, Halit; Cavus, M. Serdar; Bakir, Temelkan; Yakan, Hasan (Elsevier, 2019)1,5-Bis(5-chloro-2-oxoindolin-3-ylidene)thiocarbohydrazone (3), 1,5-Bis(5-metoxy-2-oxoindolin-3-ylidene)thiocarbohydrazone (4), 1,5-Bis(5-metoxy-2-oxoindolin-3-ylidene)carbohydrazone (5) were obtained from isatins and ... -
Synthesis, spectroscopic studies, and antioxidant activities of novel thio/carbohydrazones and bis-isatin derivatives from terephthalaldehyde
Muglu, Halit; Yakan, Hasan; Bakir, Temel Kan (Scientific Technical Research Council Turkey-Tubitak, 2020)New bis(isatins-thio/carbohydrazones) based on Schiff bases were prepared from terephthalaldehyde biscarbohydrazone and 5-substituted isatins in the presence of a drop of sulfuric acid under reflux in ethanol. Terephthalaldehyde ...
