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4-[2-(2,2-Dimethyl-4,6-dioxo-1,3-dioxan-5-ylidene)hydrazin-1-yl] benzo-nitrile
In the title compound, C 13H 11N 3O 4, the dioxane ring adopts an envelope conformation with the C atom bonded to the dimethyl group in the flap position [deviation = 0.613 (1) Å]. The nitrile group and the attached benzene ... -
Ethyl 2-[(2-hydroxybenzylidene)amino]-6-methyl-4,5,6,7-tetrahydrothieno[2, 3-c]pyridine-3-carboxylate
The title compound, C18H20N2O3S, exists as the phenol–imine form in the crystal and there are bifurcated intramolecular O—H…(N/O) hydrogen bonds present. The conformation about the C N bond is anti (1E); the C N imine bond ... -
Facile synthesis of the azocino[4,3-b]indole framework of strychnopivotine and other Strychnos alkaloids
Uludağ, Nesimi; Yılmaz, Recep; Asutay, Oktay; Çolak, Naki (Springer New York LLC, 2016)[Figure not available: see fulltext.]A new synthetic route to the 1,5-methanoazocino[4,3-b]indole is described. The aim of the present study is to provide a tetracyclic skeleton for the synthesis of pentacyclic Strychnos ... -
Fast method for synthesis of alkyl and aryl-N-methylnitrones
Yavuz, Serkan; Özkan, Hamdi; Çolak, Naki; Yıldırır, Yılmaz (MDPI AG, 2011)A simple, fast, efficient and eco-friendly procedure was developed for the synthesis of alkyl and aryl-N-methylnitrones. The corresponding nitrones of aromatic aldehydes, aliphatic aldehydes and alicyclic carbonyl compounds ... -
The inhibition of steel corrosion in acidic solutions by a new Schiff base
Bakırhan, Nurgül K.; Asan, Abdurrahman; Çolak, Naki; Şanlı, Senem (Sociedad Chilena de Quimica, 2016)The inhibition effect of 2,2?- (((thiobis (4,1 phenylene)) bis(azanylylidene)) bis(methanylyidene)) bis(4-methoxyphenol) (BIS-IMIN) on the corrosion behavior of 304-stainless steel (SS) in 0.5 M HCl solution was studied ... -
The photo-electrical properties of the p-Si/Fe(II)-polymeric complex/Au diode
Gündüz, Bayram; Turan, Nevin; Kaya, Esin; Çolak, Naki (2013)In this study, the Schiff base monomer was prepared by a common condensation method of salicylaldehyde and (E)-3-amino-4-((3-bromophenyl)diazenyl)-1H-pyrazol-5-ol. The poly(Schiff base) was synthesized from the oxidative ... -
Spectrophotometric determination of acidity constants of some novel methotrexate-like compounds in water and acetonitrile-water binary mixtures
Çolak, Naki; Şanlı, Senem; Şanlı, Nurullah (2010)The acidity constants of four novel methotrexate like compounds (NPALA; (N-[4-[[2-hydroxy -1-naphtyl)methylene]amino]benzoyl-?-alanin) TPALA; (N-[4-(2-thiophene-aldiminobenzoyl)-?-alanin), SAL-ALA; N-[4-[[2-hydroxyphenyl ... -
Spectroscopic properties of 2,2’-[Thiobis(p-phenylenenitrilo-methylidyne)]bis(4-chloro/bromo/methyl/nitro/methoxy)phenol
Çolak, Naki; Kuşçu, Volkan (Hacettepe University, 2012)Novel Schiff base has been synthesized from the reaction of 4,4’-diaminodiphenyl sulfide with 2-hydroxy5-substituebenzaldehyde and 2-hydroxynaphtaldehyde. The compounds were characterized by elemental analysis, FT-IR, 1 H ... -
Spectroscopic, antiproliferative and antiradical properties of Cu(II), Ni(II), and Zn(II) complexes with amino acid based Schiff bases
Karagöz Genç, Zuhal; Selçuk, Sibel; Sandal, Süleyman; Çolak, Naki; Keser, Serhat; Sekerci, Memet; Karatepe, Mustafa (Birkhauser Boston, 2014)Novel six Cu(II), Ni(II), and Zn(II) complexes with Schiff bases derived from 4-aminobenzoic acid with terephtaldehyde and amino acids (glycine, ?-alanine). Structures have been proposed from elemental analysis, UV-Vis, ... -
Study of structure and spectral characteristics of the Zinc(II) and Copper(II) complexes with 5,5-dimethyl-2-(2-(3-nitrophenyl) hydrazono)cyclohexane-1,3-dione and their effects on optical properties and the developing of the energy band gap and ınvestigation of antibacterial activity
Turan, Nevin; Gündüz, Bayram; Körkoca, Hanifi; Adıgüzel, Ragıp; Çolak, Naki; Buldurun, Kenan (Sociedad Quimica de Mexico A.C., 2014)A new chelating ligand, 5,5-dimethyl-2-(2-(3-nitrophenyl) hydrazono)cyclohexane-1,3-dione (L), and four transition metal complexes were synthesized. The ligand and its complexes were characterized by IR, 1H and 13C-NMR ... -
Synthesis and biological activity of new cycloalkylthiophene-Schiff bases and their Cr(III) and Zn(II) complexes
Altundaş, Aliye; Sarı, Nurşen; Çolak, Naki; Öğütcü, Hatice (Birkhauser Boston, 2010)A series of some novel Ethyl 2-((1-hydroxynaphthalen-2-yl)methyleneamino)- 5,6-dihydro-4H-cyclopenta[b]thiopehene-3-carboxylate, Ethyl 2-((1- hydroxynaphthalen- 2-yl)methyleneamino)-4,5,6,7-tetrahydrobenzo[b]thiophene-3- ... -
Synthesis and structures of Fe(II), Zn(II) and Pd(II) complexes with a schiff base derived from methyl 2-amino-6-methyl-4,5,6,7-tetrahydrothieno[2,3-c] pyridine-3-carboxylate and comparison of their optical constants for different solvents and molarities
Turan, Nevin; Buldurun, Kenan; Gündüz, Bayram; Çolak, Naki (American Scientific Publishers, 2017)Schiff base derived from condensation of o-vanillin (3-methoxysalicylaldehyde) and methyl 2-amino-6-methyl- 4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxylate and its metal complexes are synthesized and characterized ... -
Synthesis of bis(thiosemicarbazone) derivatives: Definition, crystal structure, biological potential and computational analysis
Ateş, Davut; Gülcan, Mehmet; Gümüş, Selçuk; Şekerci, Mehmet; Özdemir, Sadin; Şahin, Ertan; Çolak, Naki (Taylor and Francis Ltd., 2018)(2-(2-(2-methoxyphenyl)hydrazono)cyclohexane-1,3-diylidene) bis(hydrazine carbothioamide) (L1), 4-(2-(-2,-6-bis(2-carbamothioylhydrazono) cyclohexylidene) hydrazinyl)benzoic acid (L2), and (2-(2-(4-bromophenyl) hydrazono) ... -
Synthesis of some novel derivatives of 2,6-diaminoanthraquinone dyes
Yıldırır, Yılmaz; Canbolat, Melek; Dişli, Ali; Çolak, Naki (2008)In present study, some derivatives of 2,6-diaminoanthraquinone dyes are synthesized and their UV-visible spectra are investigated in various conditions. Ten compounds (1a-e) and (2a-e), two of which (1a, 1b) were previously ... -
Synthesis of {substituted-[(4-{[4-(carboxymethyl-carbamoyl)phenylimino] methyl}benzylidene)-amino]benzoylamino}carboxylic acids
Çolak, Naki; Yıldırır, Yılmaz (2008)Some novel derivatives of methotrexate like compounds 2a-f have been synthesized, using terephthalaldehyde, isophthalaldehyde, 4-aminobenzoic acid and amino acids (glycine, ?-alanine, L-glutamic acid). The structures of ... -
Synthesis, characterization of poly(E)-3-amino-4-((3-bromophenyl)diazenyl)-1H-pyrazol-5-ol: Investigation of antibacterial activity, fluorescence, and optical properties
The oxidative polycondensation reaction conditions of (E)-3-amino-4-((3-bromophenyl)diazenyl)-1H-pyrazol-5-ol (Schiff base monomer) has been accomplished using NaOCl, and air O 2 oxidants in an aqueous alkaline medium. The ... -
Synthesis, characterization of poly-2- (2-hydroxybenzylideneamino)-6- phenyl-4,5,6, 7-tetrahydrobenzo[b]thiophene-3-carbonitrile: Investigation of antibacterial activity and optical properties
The oxidative polycondensation reaction conditions of 2-(2- hydroxybenzylideneamino)-6-phenyl-4,5,6,7-tetrahydrobenzo[b]thiophene-3- carbonitrile were examined. The magnitude of the reflectance of the polymer decreases ... -
Synthesis, characterization, and antimicrobial properties of a new ligand and its Pd(II), Ru(II), Fe(II), Co(II) complexes
Buldurun, Kenan; Turan, Nevin; Alan, Yusuf; Çolak, Naki (Düzce Üniversitesi, 2018)Schiff bases and their complexes are versatile compounds synthesized from the condensation of an amino compound with carbonyl compounds and widely used for industrial purposes and also exhibit a broad range of biological ... -
Synthesis, characterization, antioxidant, antimicrobial and DNA binding properties of ruthenium(II), cobalt(II) and nickel(II) complexes of Schiff base containing o-vanillin
Turan, Nevin; Buldurun, Kenan; Alan, Yusuf; Savcı, Ahmet; Çolak, Naki; Mantarcı, Asım (Springer Netherlands, 2019)In this study, the complex combinations of Ru(II), Co(II) and Ni(II) with Schiff base obtained through the condensation of (E)-methyl 2-amino-6-methyl-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxylate with 2-hydroxy- ... -
Synthesis, spectroscopic and thermal characterization of non-metal cation (nmc) pentaborates salts containing cations derived from histidine and arginine
Köse, Dursun Ali; Beckett, Micheal Andrew; Çolak, Naki (Hacettepe University, 2012)The new non-metal cation (NMC) pentaborate structures of cationic histidine and arginine aminoacids were synthesized and characterized using spectroscopic (11B NMR and IR) methods. Their thermal properties have been ...