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Öğe 4-(2-Methoxy-4-(prop-1-enyl)phenoxy)phthalonitrile; synthesis, characterization, Hirshfeld surface analysis and chemical activity studies(Taylor & Francis Ltd, 2018) Ersanli, Cem Cuneyt; Kantar, Gunay Kaya; Demircioglu, Zeynep; Sasmaz, SelamiThis work deals with experimental and theoretical study of the 4-(2-methoxy-4-(prop-1-enyl)phenoxy)phthalonitrile (MPPP). The MPPP was synthesized and characterized by FT-IR and NMR, and X-ray single-crystal determination. Hirshfeld surface analysis revealed the nature of intermolecular contacts, the fingerprint plots and molecular surface contours provided the information about the percentage contribution and bond interactions. The structural data of the molecule in the ground state was calculated using the DFT employing B3LYP/6-311++G(d,p) basis set. The energetic behavior of the organic dye sensitizer MPPP in solvent media was examined. In addition, chemical activity, NLO, net charges by MPA & NPA, MEP and Fukui function analysis were investigated. Based on vibrational analysis, the thermodynamic properties were calculated at different temperatures and corresponding relations between the properties and temperature were obtained.Öğe A chalcone showing positional disorder, two related diarylcyclohexenones showing enantiomeric disorder and a related hydroxyterphenyl, all derived from simple carbonyl precursors(Int Union Crystallography, 2015) Salian, Vinutha V.; Narayana, Badiadka; Yathirajan, Hemmige S.; Akkurt, Mehmet; Celik, Omer; Ersanli, Cem Cuneyt; Glidewell, ChristopherFour compounds are reported, all of which lie along a versatile reaction pathway which leads from simple carbonyl compounds to terphenyls. (2E)-1-(2,4- Dichlorophenyl)-3-[4-(prop-1-en-2-yl)phenyl]prop-2-en-1-one, C18H14Cl2O, (I), prepared from 4-(prop-1-en-2-yl)benzaldehyde and 2,4-dichloroacetophenone, exhibits disorder over two sets of atomic sites having occupancies of 0.664 (6) and 0.336 (6). The related chalcone (2E)-3-(4-chlorophenyl)-1-(4-fluorophenyl)-prop-2-en-1-one reacts with acetone to produce (5RS)-3-(4-chlorophenyl)-5-[4-(propan-2-yl)phenyl]cyclohex-2-en-1-one, C21H21ClO, (II), which exhibits enantiomeric disorder with occupancies at the reference site of 0.662 (4) and 0.338 (4) for the (5R) and (5S) forms; the same chalcone reacts with methyl 3-oxobutanoate to give methyl (1RS, 6SR)-4-(4-chlorophenyl)-6-[4-(propan-2-yl)phenyl]-2-oxocyclohex-3-ene-1-carboxylate, C23H23ClO3, (III), where the reference site contains both (1R,6S) and (1S,6R) forms with occupancies of 0.923 (3) and 0.077 (3), respectively. Oxidation, using 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, of ethyl (1RS, 6SR)-6-(4-bromophenyl)-4-(4-fluorophenyl)-2-oxocyclohex-3-ene-1-carboxylate, prepared in a similar manner to (II) and (III), produces ethyl 4 ''-bromo-4-fluoro-5'-hydroxy-1,1':3',1 ''-terphenyl-4'-carboxylate, C21H16BrFO3, (IV), which crystallizes with Z' = 2 in the space group P (1) over bar. There are no significant intermolecular interactions in the structures of compounds (I) and (II), but for the major disorder component of compound (III), the molecules are linked into sheets by a combination of C-H center dot center dot center dot O and C-H center dot center dot center dot pi(arene) hydrogen bonds. The two independent molecules of compound (IV) form two different centrosymmetric dimers, one built from inversion-related pairs of C-H center dot center dot center dot O hydrogen bonds and the other from inversion-related pairs of C-H center dot center dot center dot pi(arene) hydrogen bonds. Comparisons are made with related compounds.Öğe Activation of 6-bromoquinoline by nitration: synthesis of morpholinyl and piperazinyl quinolines(Arkat Usa Inc, 2018) Cakmak, Osman; Okten, Salih; Alimli, Dilek; Saddiqa, Aisha; Ersanli, Cem CuneytQuinoline forms the key skeletal component of a number of important natural products and pharmacologically-active compounds. Despite a tremendous amount of research pertaining to the derivatization of quinoline, very few general synthetic routes are described in the literature starting from quinoline or tetrahydroquinoline. A simple and convenient method for the polyfunctionalization of quinolines via nitration of bromoquinolines has been developed. This method represents a new synthetic approach to convert brominated nitroquinoline derivatives into useful cyclic amines via nucleophilic-substitution (SNAr) reaction. [GRAPHICS] .Öğe Crystal structure of 3,4a, 7,7,10a-pentamethyl-3-vinyldodecahydro-1H-benzo[f]chromen-9-ol isolated from Sideritis perfoliata(Int Union Crystallography, 2016) Celik, Ismail; Ersanli, Cem Cuneyt; Koseoglu, Rahmi; Aksit, Huseyin; Erenler, Ramazan; Demirtas, Ibrahim; Akkurt, MehmetThe asymmetric unit of the title compound, C20H34O2, contains two crystallographically independent molecules (1 and 2) with similar conformations. In both molecules, the cyclohexane rings adopt a chair conformation, while the oxane rings are also puckered. In the crystal, O-H center dot center dot center dot O hydrogen bonds connect adjacent molecules, forming C(6) helical chains located around a 21 screw axis and running along the crystallographic a axis. The packing of these chains is governed only by van der Waals interactions. Semi-empirical PM3 quantum chemical calculations are in a satisfactory agreement with the structural results of the X-ray structure analysis. The absolute structure was indeterminate in the present experiment.Öğe Crystal structure of racemic [(1R,2S,3R,4S,6S)-2,6-bis(furan-2-yl)-4-hydroxy-4-(thiophen-2-yl)cyclohexane-1,3-diyl]bis(thiophen-2-ylmethanone)(Int Union Crystallography, 2016) Celik, Ismail; Ersanli, Cem Cuneyt; Akkurt, Mehmet; Gezegen, Hayrettin; Koseoglu, RahmiIn the title compound, C28H22O5S3, the central cyclohexane ring adopts a chair conformation. The atoms of the furan ring attached to the 6-position of the central cyclohexane ring are disordered over two sets of sites with occupancies of 0.832 (5) and 0.168 (5). The hydroxy group is disordered over two positions (at the 4- and 6-positions of the cyclohexane ring) in the ratio 0.832 (5): 0.168 (5). In the crystal, molecules are linked by C-H center dot center dot center dot O hydrogen bonds and C-H center dot center dot center dot pi interactions, forming layers parallel to (100).Öğe Crystal structure of racemic [(1R,2S,3R,4S,6S)-2,6-bis(furan-2-yl)-4-hydroxy-4-(thiophen-2-yl)cyclohexane-1,3-diyl]bis(thiophen-2-ylmethanone) (vol E72, pg 976, 2016)(Int Union Crystallography, 2016) Celik, Ismail; Ersanli, Cem Cuneyt; Akkurt, Mehmet; Gezegen, Hayreddin; Koseoglu, Rahmi[No abstract available]Öğe Crystallographic, spectroscopic (FTIR and NMR) and quantum computational calculation studies on bis(2-methoxy-4-((E)-prop-1-enyl)phenyl)oxalate(Elsevier, 2017) Ersanli, Cem Cuneyt; Kantar, Gunay Kaya; Sasmaz, SelamiIn this paper, we report first, a new synthesis of bis(2-methoxy-4-((E)-prop-1-enyl)phenyl)oxalate, namely, C22H22O6, (I). Then, we present detailed FTIR, H-1 NMR,C-13 NMR spectroscopies and single-crystal X-ray diffraction techniques, Hartree-Fock (HF) and Density Functional Theory (DFT) molecular orbital calculation study of the title compound. Compound (I) crystallizes in the monoclinic space group P2(1)/c, with Z = 2 in cells with a = 6.3440(5)angstrom, b = 10.1098(9)angstrom, c = 16.1899(15)angstrom, V = 1035.65(16)angstrom(3) and displays weak C-H center dot center dot center dot O intermolecular interaction which contributes to crystal packing. The molecular geometry was also calculated using the Gaussian03W software, and structure was optimized using the HF and DFT/B3LYP methods with the 6-31G(d,p) basis set at the ground state. The harmonic vibrational frequencies, H-1 and C-13 NMR chemical shifts of I were calculated using the same method with the 6-31G(d,p) basis set. The calculated results show that the predicted geometry can well reproduce structural parameters. The energetic behaviors of the title compound in solvent media were examined using the DFT/B3LYP method with the 6-31G(d,p) basis set applying the Polarizable Continuum Model (PCM). Besides, the frontier molecular orbitals (FMOs), Mulliken population method, natural population analysis (NPA), molecular electrostatic potential (MEP) map of the title compound were investigated by theoretical calculations. Based on vibrational analyses, the thermodynamic properties of I at different temperatures have been calculated, and corresponding relations between the properties and temperature have also been obtained. (C) 2017 Elsevier B.V. All rights reserved.Öğe Dihydrooxazolones and dihydroimidazolones derived from acylglycines: syntheses, molecular structures and supramolecular assembly(Int Union Crystallography, 2015) Subbulakshmi, Karanth N.; Narayana, Badiadka; Yathirajan, Hemmige S.; Akkurt, Mehmet; Celik, Omer; Ersanli, Cem Cuneyt; Glidewell, ChristopherSyntheses and structures are described for some alkylidene-substituted dihydrooxazolones and dihydroimidazoles derived from simple acylglycines. A second, triclinic, polymorph of 4-benzylidene-2-(4-methylphenyl)-1,3-oxazol-5(4H)-one, C17H13NO2, (I), has been identified and the structure of 2-methyl-4-[(thiophen-2-yl) methylidene]-1,3-oxazol-5(4H)-one, C9H7NO2S, (II), has been rerefined taking into account the orientational disorder of the thienyl group in each of the two independent molecules. The reactions of phenylhydrazine with 2-phenyl-4-[(thiophen-2-yl) methylidene]-1,3-oxazol-5(4H)-one or 2-(4-methylphenyl)-4-[(thiophen-2-yl) methylidene]-1,3-oxazol-5(4H)-one yield, respectively, 3-anilino-2-phenyl-5-[(thiophen-2-yl) methylidene]-3,5-dihydro-4H-imidazol-4-one, C10H15N3OS, (III), and 3-anilino-2-(4-methylphenyl)-5-[(thiophen-2-yl) methylidene]-3,5-dihydro-4H-imidazol-4-one, C21H17N3OS, (IV), which both exhibit orientational disorder in their thienyl groups. The reactions of 2-phenyl-4[(thiophen-2-yl) methylidene]-1,3-oxazol-5(4H)-one with hydrazine hydrate or with water yield, respectively, N-[3-hydrazinyl-3-oxo-1-(thiophen-2-yl) prop-1en-2-yl] benzamide and 2-(benzoylamino)-3-(thiophen-2-yl) prop-2-enoic acid, which in turn react, respectively, with thiophene-2-carbaldehyde to form 2-phenyl-5-[(thiophen-2-yl) methylidene]-3-{[(E)-(thiophen-2-yl) methylidene]amino}-3,5-dihydro-4H-imidazol-4-one, C19H13N3OS2, (V), which exhibits orientational disorder in only one of its thienyl groups, and with methanol to give methyl (2Z)-2-(benzoylamino)-3-(thiophen-2-yl) prop-2-enoate, C15H13NO3S, (VI). There are no direction-specific intermolecular interactions in the crystal structure of the triclinic polymorph of (I), but the molecules of (II) are linked by two independent C-H center dot center dot center dot O hydrogen bonds to form C-2(2)(14) chains. Compounds (III) and (IV) both form centrosymmetric R-2(2)(10) dimers built from N-H center dot center dot center dot O hydrogen bonds, while compound (V) forms a centrosymmetric R-2(2)(10) dimer built from C-H center dot center dot center dot O hydrogen bonds. In the structure of compound (VI), a combination of N-H center dot center dot center dot O and C-H center dot center dot center dot pi (arene) hydrogen bonds links the molecules into sheets. Comparisons are made with some similar compounds.Öğe Experimental and theoretical approach: Chemical activity, charge transfer of DNA/ECT, thermodinamic, spectroscopic, structural and electronic properties of N-(4-(3-methyl-3-phenylcyclobutyl)thiazol-2-yl)acetamide molecule(Elsevier, 2020) Ekici, Oner; Demircioglu, Zeynep; Ersanli, Cem Cuneyt; Cukurovali, AlaaddinN-(4-(3-methyl-3-phenylcyclobutyl)thiazol-2-yl)acetamide compound was synthesized and characterized by using FT-IR, UV-Vis, NMR and X-ray diffraction techniques. The title compound crystallizes in monoclinic space group P2(1)/c with four molecules in the unit cell and unit cell dimensions are a = 15.590(3) angstrom, b = 9.1348(15) angstrom and c = 11.035(2) angstrom. Hirshfeld surface (HS) analysis reveals the nature of intermolecular contacts, the fingerprint plots and molecular surface contours. All theoretical computations were calculated by using density functional theory (DFT) B3LYP method with the help of 6-311++G(d,p) basis set. The global (FMOs, hardness and softness parameters) and local (MEP, FF, net charges) chemical activity descriptors were investigated and the results indicated that the optimized structure is more electrophilic nature than nucleophilic one. According to ECT (electrophilicity-based charge transfer) method and Delta N (charge transfer) results, the electrons were transferred from the DNA bases of adenine to title molecule. Therefore, the adenine treated as the electron donor and the title molecule as the electron acceptor. The other DNA bases of cytosine, guanine, and thymine bases showed electrophilic nature and electrons were transferred from title molecule to these DNA bases. The stability of the molecule arising from hyperconjugative interactions, charge delocalization was analyzed by using natural bond orbital analysis (NBO). The thermodynamic properties of the title compound at different temperatures have been calculated, and corresponding relations between the properties and temperature have also been obtained. (C) 2019 Elsevier B.V. All rights reserved.Öğe Experimental and theoretical investigations on a furan-2-carboxamide-bearing thiazole: synthesis, molecular characterization by IR/NMR/XRD, electronic characterization by DFT, Hirshfeld surface analysis and biological activity(Int Union Crystallography, 2022) Cakmak, Sukriye; Kirca, Basak Kosar; Veyisoglu, Aysel; Yakan, Hasan; Ersanli, Cem Cuneyt; Kutuk, HalilA thiazole-based heterocyclic amide, namely, N-(thiazol-2-yl)furan-2-carbox-amide, C8H6N2O2S, was synthesized and investigated for its antimicrobial activity. The structure was characterized by elemental analysis and IR, H-1 NMR, and C-13 NMR spectroscopy. The molecular and electronic structures were investigated experimentally by single-crystal X-ray diffraction (XRD) and theoretically by density functional theory (DFT) modelling. The compound crystallized in the monoclinic space group P2(1)/n and the asymmetric unit contains two symmetrically independent molecules. Several noncovalent interactions were recorded by XRD and analysed with Hirshfeld surface analysis (HSA) calculations. Natural bond orbital, molecular electrostatic potential, second-order nonlinear optical and thermodynamic property analyses were also carried out using the DFT/B3LYP method. The title compound was evaluated for antimicrobial activity against eight microorganisms consisting of Gram-negative bacteria, Gram-positive bacteria and fungi. The compound showed good antimicrobial activity against the eight tested microorganisms. This suggests that the compound merits further study for potential pharmacological and medical applications.Öğe Molecular and crystal structure of 1-methyl-5-trifluoromethoxy-1H-indole-2,3-dione 3-[4-(4-methoxyphenyl)thiosemicarbazone](Istanbul Univ, Fac Pharmacy, 2021) Eter, Ozge Soylu; Atioglu, Zeliha; Akkurt, Mehmet; Ersanli, Cem Cuneyt; Karali, NilgunBackground and Aims: The main purpose of this study is to determine the molecular structure and isomers of the new 1-methyl-5-trifluoromethoxy-1H-indole-2,3-dione 3-[4-(4-methoxyphenyl)thiosemicarbazone] (5) and to prove the 3Z-conformer of the compound 5. Methods: The molecular structure of E- and Z-isomer mixture 5 was confirmed by analytical and spectral data (UV, IR, H-1 NMR, HSQC-2D and MS). The Z-conformer of compound 5 was characterized by NMR spectroscopy and X-ray single crystal diffraction analysis method (SC-XRD). Results: The compound 5 was synthesized by condensation of 1-methyl-5-trifluoromethoxy-1H-indole-2,3-dione (2) with 4-(4-methoxyphenyl)thiosemicarbazide (4). The compound 5 was obtained in two separate forms, crystal and amorphous. It was proved by NMR data and X-ray diffraction findings that the crystal form is the Z-isomer and the amorphous form is a mixture of the E- and Z-isomers. The E- and Z-isomer ratios were determined by H-1 NMR spectroscopy. The crystal structure and molecular interactions of the Z-conformer were determined by X-ray single crystal diffraction analysis. Conclusion: In the crystal, three intramolecular N-H center dot center dot center dot N, N-H center dot center dot center dot O and C-H center dot center dot center dot S hydrogen bonds provided isomer formation. Also, molecular packing was stabilized by intermolecular C-H center dot center dot center dot O hydrogen bonds, the pi-pi stacking interactions and weak CO center dot center dot center dot pi (ring) contacts.Öğe Molecular and electronic structures of two new Schiff base compounds: (E)-2-bromo-6-[(2-bromo-4-methylphenylimino) methyl]-4-chlorophenol and (E)-2-bromo-6-[(4-bromo-3-methylphenylimino) methyl]-4-chlorophenol(Elsevier, 2021) Kirca, Basak Kosar; Kastas, Cigdem Albayrak; Ersanli, Cem CuneytTwo new Schiff base compounds, (E)-2-bromo-6-[(2-bromo-4-methylphenylimino) methyl]-4-chlorophenol, (I) and (E)-2-bromo-6-[(4-bromo-3-methylphenylimino) methyl]-4-chlorophenol (II) have been synthesized and characterized by X-ray single crystal diffraction, FT-IR, UV-Vis and NMR spectroscopic techniques for this study. Moreover, the density functional theory calculations have been performed at the B3LYP method with 6-311G(d,p) basis set. The gas phase geometry optimizations of two possible forms resulting from the prototropic tautomerism of the title compounds have been obtained. While the X-ray and UV-Vis studies show that the compounds adopt OH tautomeric form in the solid state and solvent media, the density functional theory calculations also confirm that the OH tautomeric form is the most stable for both compounds. The crystal structures exhibit both inter-and intra-molecular hydrogen bond interactions, pi-pi stacking interactions and halogen bonds which play significant role in building the three dimensional network. (C) 2021 Elsevier B.V. All rights reserved.Öğe Molecular structure, spectroscopic and quantum chemical studies of 1′,3′,3′-trimethylspiro[benzo[f]chromene-3,2′-indoline(Elsevier, 2016) Asiri, Abdullah M.; Ersanli, Cem Cuneyt; Sahin, Onur; Arshad, Muhammad Nadeem; Hameed, Salem A.In this work, synthesis, X-ray single crystal determination, nuclear magnetic resonance (H-1 NMR and C-13 NMR), Ultraviolet-Visible (UV-vis), Fourier transform infrared spectroscopy (FT-IR) and quantum mechanical studies of the 1',3',3'-trimethylspiro[benzo[f]chromene-3,2'-indoline [(C23H21NO), TMSBCI] have been both experimentally and theoretically reported. The molecular structure obtained from X-ray single-crystal analysis of the investigated compound in the ground state has been compared using Hartree-Fock (HF) and density functional theory (DFF) with the functional B3LYP using the 6-31G(d,p) as basis set. In addition to the optimized geometrical structures, atomic charges, molecular electrostatic potential (MEP) and natural bond orbital (NBO) have been investigated by using B3LYP/6-31G(d,p) level of the theoretical approximation for the title compound. The energetic behavior of TMSBCI has been examined in solvent media using polarizable continuum model (PCM). The total dipole moment (mu), the average linear polarizability (alpha), and the first-order hyperpolarisability (beta) values of the investigated molecule have been computed using the same method. The experimental measurements (H-1 NMR, C-13 NMR and UV vis) have been compared with its corresponding the calculated values (using DFT). Besides, frontier molecular orbitals (FMOs) and thermodynamic properties have also been studied. (C) 2016 Elsevier B.V. All rights reserved.Öğe Molecular structure, spectroscopic investigations, second-order nonlinear optical properties and intramolecular proton transfer of (E)-5-(diethylamino)-2-[(4-propylphenylimino)methyl]phenol: A combined experimental and theoretical study(Pergamon-Elsevier Science Ltd, 2012) Kosar, Basak; Albayrak, Cigdem; Ersanli, Cem Cuneyt; Odabasoglu, Mustafa; Buyukgungor, OrhanThis work presents a combined experimental and theoretical study on an ortho-hydroxy Schiff base compound, (E)-5-(diethylamino)-2-[(4-propylphenylimino)methyl]phenol. The crystal structure and spectroscopic properties of the compound have been determined by using X-ray diffraction, IR and UV-vis spectroscopy techniques. The electronic structure, vibrational frequencies and electronic absorption spectra have been investigated from the calculative point of view. A relaxed potential energy surface scan has been performed based on the optimized geometry of OH tautomeric form to describe the potential energy barrier belonging to intramolecular proton transfer and to observe the effects of transfer on the molecular geometry. The second-order nonlinear optical properties have been investigated based on the first static hyperpolarizability (beta) by using the density functional theory. (C) 2012 Elsevier B.V. All rights reserved.Öğe Novel methoxyquinoline derivative: Synthesis, characterization, crystal structure, Hirshfeld surface, thermodynamic properties, and quantum chemical calculation of 3,6,8-trimethoxyquinoline(Taylor & Francis Ltd, 2021) Okten, Salih; Demircioglu, Zeynep; Ersanli, Cem Cuneyt; Cakmak, OsmanIn this study, we describe the synthesis and structural characterization of novel 3,6,8-trimethoxyquinoline (2) by X-ray, FT-IR, NMR analysis, and its computational investigations. The molecular geometry of title coumpound was also optimized by using density functional theory (DFT/B3LYP) and Hartree-Fock (HF) methods with the 6-311 G(d,p) basis set, and geometric parameters were compared with the experimental data. Theoretical calculations are a good way for obtaining comprehensive information about global and local chemical activity, and chemical and molecular properties that reveal the nucleophilic and electrophilic nature. Molecular electrostatic potential (MEP) distribution, thermodynamic parameters, frontier molecular orbitals (FMOs), Fukui functions, and net charge analysis of (2) were also investigated. Also, the interactions between the molecule with DNA bases such as guanine, adenine, thymine, and cytosine were investigated by using the electrophilicity-based charge transfer (ECT) method and charge transfer (Delta N) for investigating the charge transfer, electrophilic, and nucleophilic nature.Öğe Novel piperazine and morpholine substituted quinolines: Selective synthesis through activation of 3,6,8-tribromoquinoline, characterization and their some metabolic enzymes inhibition potentials(Elsevier, 2020) Cakmak, Osman; Okten, Salih; Alimli, Dilek; Ersanli, Cem Cuneyt; Taslimi, Parham; Kocyigit, Umit MuhammetRegioselective routes are described for convenient preparation of novel piperazine/morpholine substituted quinoline derivatives at C-3, C-6 and C-8 starting with 3,6,8-tribromoquinoline (6) by nucleophilic substitution via conventional heating or microwave assisted reaction conditions. 3,6,8-Tribromoquinoline (6) was treated with piperazine and morpholine under microvawe irradiation, which selectively furnished 3-mopholinyl and 3-piperazinyl quinoline derivatives 7 and 8 in yields of 58% and 60%, respectively. On the other hand, the activation of benzene cycle of quinoline by nitration of 3,6,8-tribromoquinoline, giving 5-nitro-3,6,8-tribromoquinoline (18) in quantitative yield, was enabled. Then, the bromines at C-6 and C-8 were selectively exchanged by morpholine and piperazine via SNAr reactions. Thus, 6,8-dimopholinylquinoline (22) and 5-nitro-6,8-dipiperazinylquinoline (24), biologically valuable derivatives, were prepared in high yields (82% and 72%, respectively). The synthesized compounds were fully characterizated by H-1 NMR, C-13 NMR, 2D NMR, XRD, HRMS and IR spectra. The novel molecules had effective inhibition profiles against some metabolic enzymes. Also, they have the potential of drug candidates to treat of some diseases including glaucoma, epilepsy, Alzheimer's disease (AD), leukemia, and type-2 diabetes mellitus (T2DM). (C) 2020 Elsevier B.V. All rights reserved.Öğe Spectroscopic, Hirshfeld surface, X-ray diffraction methodologies and local & global chemical activity calculations of 5-(2-methoxy-4-(prop-1-en-1-yl)phenoxy)pyrazine-2,3-dicarbonitrile(Elsevier, 2019) Demircioglu, Zeynep; Ersanli, Cem Cuneyt; Kantar, Gunay Kaya; Sasmaz, SelamiThe new compound of 5-(2-Methoxy-4-(prop-1-en-1-yl)phenoxy)pyrazine-2,3-dicarbonitrile was synthesized and structure was characterized by using XRD, FT-IR and NMR techniques. All theoretical computations were calculated by using density functional theory (DFT) B3LYP method with the help of 6-31 + G(d) basis set. Theoretical calculations help to obtaining detailed information about chemical activity, electrophilic/nucleophilic nature, molecular and chemical properties that can not be obtained by experimental ways. Accordingly, molecular electrostatic potential, hardness/softness parameters, net charges analyses were investigated to gain electrophilic/nucleophilic nature of molecule. Also, the electron density based local reactivity descriptors such as Fukui functions were discussed with regard to electrophilic/nucleophilic nature. The results from natural bond orbital analysis were analyzed interms of the hybridization of atoms and the electronic structure of the title molecule. The stability of the molecule arising from hyperconjugative interactions, charge delocalization was analyzed by using natural bond orbital analysis. The dipole moment (mu) and polarizability (alpha), and first order hyperpolarizability (beta) of the molecule was reported and the results of these were given information about the material capability to generate non-linear effects (NLO). The interactions between the molecule with DNA bases such as adenine, cytosine, guanine, and thymine were investigated by using the ECT (electrophilicity-based charge transfer) method and Delta N (charge transfer). (C) 2018 Published by Elsevier B.V.Öğe Synthesis of some novel indeno[1,2-b]quinoxalin spiro-β-lactam conjugates(Pergamon-Elsevier Science Ltd, 2017) Rad, Javad Ameri; Jarrahpour, Aliasghar; Ersanli, Cem Cuneyt; Atioglu, Zeliha; Akkurt, Mehmet; Turos, EdwardThis article reports the synthesis of some new spiro-beta-lactams bearing an indeno[1,2-b]quinoxaline ring system, prepared by a [2 + 2] cycloaddition of ketenes with imines derived from 11-H-indeno[1,2-b] quinoxalin-11-one. The structures of newly synthesized spiro-beta-lactams 2a-i and 3a-i were characterized by FT-IR, H-1 NMR, C-13 NMR, mass spectrometry and elemental analyses. The relative stereochemistry of spiro-beta-lactams 2a and 3a was determined unequivocally by X-ray crystallographic studies. (C) 2017 Elsevier Ltd. All rights reserved.Öğe Synthesis, Crystal Structure and Theoretical Characterization of (3R, 4R, 6S)-3,6-Dihydroxy-1-Menthene Isolated from Echinophora Tenuifolia(Gazi Univ, 2016) Celik, Ismail; Ersanli, Cem Cuneyt; Akkurt, Mehmet; Aksit, Huseyin; Erenler, RamazanIn the title compound, C10H18O2, the cyclohexene ring adopts a half-chair conformation. In the crystal strcuture, weak inter(sic)molecular O-H center dot center dot center dot O hydrogen bonds connect the adjacent molecules, forming edge-fused R23(8) ring motifs, into the hollow columns parallel to the b-axis direction. The crystal packing is governed only by van der Waals inter(sic)actions. There is no further C-H center dot center dot center dot pi and pi-pi interactions. The H atom in one of two hydroxyl groups was found to be disordered over two sites. The occupancy factors of the two sites were refined to 0.52 (2) and 0.48 (2). Semi-empirical PM3 quantum chemical calculations are in satisfactory agreement with the results of the X-ray structure analysis.Öğe Synthesis, crystal structure, computational chemistry studies and Hirshfeld surface analysis of two Schiff bases, (E)-2-[(4-bromo-2-methylphenylimino)methyl]-4-methylphenol and (E)-2-[(4-bromo-2-methylphenylimino)methyl]-6-methylphenol(Taylor & Francis Ltd, 2021) Demircioglu, Zeynep; Kastas, Cigdem Albayrak; Kastas, Gokhan; Ersanli, Cem CuneytIn this study, two Schiff bases, (E)-2-[(4-bromo-2-methylphenylimino)methyl]-4-methylphenol (I) and (E)-2-[(4-bromo-2-methylphenylimino)methyl]-6-methylphenol (II) are synthesized and characterized by XRD and UV-Vis spectroscopy. The presence of various intermolecular interactions and 2 D-fingerprint regions are well supported by the Hirshfeld surface analysis. Also experimental optical energy band and gap studies are discussed. All theoretical computations (NBO, FMOs, MEP, NP, MP, FF) were calculated by Density Functional Theory (DFT) at B3LYP level by using 6-311 G(d,p) basis set. The interactions between the title molecules and DNA bases were investigated by using the ECT (electrophilicity-based charge transfer) method.
