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    Öğe
    A 1:1 cocrystal of (1R,3S,4S,6R)-1,2,3,4,5,6-hexabromo-1,2,3,4,5,6-hexahydropentalene and (1R,2R,4S,5S)-1,2,3,4,5,6-hexabromo-1,2,4,5-tetrahydropentalene
    (Int Union Crystallography, 2006) Hokelek, Tuncer; Gunbas, Duygu D.; Algi, Fatih; Balci, Metin
    The components of the title compound, C8H6Br6 and C8H4Br6, are hexa- and tetrabromopentalene derivatives, which were obtained by the treatment of hexahydropentalene with a tenfold excess of bromine. The asymmetric unit consists of two half-mol-ecules. Crystallographic centres of symmetry are located at the mid-points of the central C=C and C-C bonds. The repulsive inter-actions between the Br atoms may affect the mol-ecular geometry.
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    Addition of dibromocarbene to cyclobutene: Characterisation and mechanism of formation of the products
    (Scientific Reviews Ltd., 2004) Algi, Fatih; Hökelek, Tuncer; Balci, Metin
    Cyclobutene reacted with dibromocarbene in solution to give 1,5-dibromocyclopent-1-ene (9), 1,2,6, 6-tetrabromobicyclo[3.1.0]hexane (10), and 1,2,3,6-tetrabromocyclohex-1-ene (11), in a ratio of 1:4:8, respectively. Compounds 10 and 11 were found to be formed from a second carbene addition and rearrangement under the given reaction conditions.
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    Öğe
    Bromofluorocarbene addition to 6-phenylbicyclo[3.2.0]hept-6-ene: characterization and formation mechanism of the products
    (Arkat Usa Inc, 2006) Algi, Fatih; Balci, Metin
    Bromofluorocarbene addition to 6-phenylbicyclo[3.2.0]hept-6-ene provided fluoro-indanes such as 4,6-difluoro-5-phenylindane, 5,6-difluoro-4-phenylindane, 5,7-difluoro-4-phenylindane, 4-bromo-6-fluoro-5-phenylindane and 5-bromo-6-fluoro-4-phenylindane. The characterization the formation mechanism of the products are discussed.
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    Öğe
    DFT calculations of pentalenoquinones: towards the interception of 2-bromopentalene-1,5-dione
    (Arkat Usa Inc, 2008) Atalar, Taner; Algi, Fatih; Balci, Metin
    To reveal the stability and the aromatic character of pentalenoquinones (PQs) 1-4 and the corresponding bromo derivatives (Br-PQs) 6-9, DFT calculations (B3LYP/6-311+G(d,p)) concerning the geometry optimization, total energy and nucleus independent chemical shift (NICS) values were performed. It was found that all of the compounds have planar geometry. As the energy difference between HOMO-LUMO energy levels (Delta epsilon=epsilon(LUMO) - epsilon(HOMO)) and total energies were considered for the pentalene family, the stability order was found to be 1 > 2 > 3 > 4 for PQs, and 6 > 7 > 8 > 9 for Br-PQs. Furthermore 2-bromopentalene-1,5-dione (6) in solution was investigated and noted that it was too reactive to be isolated or even trapped.
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    Öğe
    Simple, mild, and efficient method for the reduction of 1,4-benzoquinones to hydroquinones by the action of NaN3
    (Taylor & Francis Inc, 2006) Algi, Fatih; Balci, Metin
    A simple, mild, and efficient method is presented for the reduction of 1,4-benzoquinones to hydroquinones by the action of NaN3 under neutral conditions in the presence of water.
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    Öğe
    Synthesis of Novel 1,4-Benzoquinone-Containing 1,2,3-Triazoles: An Entry Into a New Library
    (Georg Thieme Verlag Kg, 2009) Algi, Fatih; Balci, Metin
    A heretofore unexplored library of 1,4-benzoquinone-containing 1,2,3-triazoles was prepared by the application of a highly regioselective copper(1)-catalyzed process. Furthermore, the utilization of this novel triazole-1,4-benzoquinone system as an interesting class of extended, branched molecules for the construction of new supramolecular architectures is presented.