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    The 1:1 co-crystallization of enantiomers of an arene-tethered and ortho-metallated N-heterocyclic carbene ruthenium(II) half-sandwich complex: Synthesis, structural characterization and theoretical study
    (2008) Karabiyik H.; Kilinçarslan R.; Aygün M.; Çetinkaya B.; García-Granda S.
    The reaction of [RuCl2(p-cymene)]2 with in situ deprotonated NHC precursor 1,3-bis(biphenyl-2-yl)imidazolinium chloride was carried out in p-xylene at 140 °C to produce {A figure is presented}2, in which the NHC moiety acts as a tridentate C,C',C''-ligand. The complex 2 was characterized by NMR spectroscopy and X-ray crystallographic study. Crystallographic analysis combined with computational study regarding the compound, 1-[?6-(2'-biphenyl)]-3-[2-phenyl-1,2-phenylene]imidazolidin-2-ylidenechlororuthenium(II), 2, reveals that its metal-centered enantiomers are co-crystallized in 1:1 ratio and NHC frame possessing a tridentate coordination mode consists of ?-donation of the carbene carbon, ?6-arene tethering of terminal biaryl and ?1-coordination of the biphenyl ring at 2-position. Enantiomers of the complex are packed as asymmetric dimers in solid state formed by C-H?Cl type weak H-bonds and C-H?? type interactions giving rise to asymmetric chains. Both interactions serve to stabilization of the extended structure. © 2007 Elsevier Masson SAS. All rights reserved.
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    Synthesis and structural characterization of (1,3-bis(methoxyethyl)-4,5- bis(2,4,6-trimethylphenyl)-imidazolidin-2-ylidene)chloro(1,5-cyclooctadiene) rhodium(I)
    (2006) Karabiyik H.; Kilinçarslan R.; Aygün M.; Çetinkaya B.; Büyükgüngör O.
    A new N-heterocyclic carbene (NHC) ligand with bulky substituents and functionalized methoxy-donor side arms complexed with Rh(I) was synthesized and characterized by elemental analysis, 1 H and 13 C NMR, and IR spectroscopy. The crystal and molecular structure was determined by single-crystal X-ray diffraction techniques. Two carbon atoms in the cyclooctadiene ring and three ortho methyl groups have positional and orientational disorder, respectively. Rhodium has square-planar coordination geometry. © 2006 Taylor & Francis.
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    The synthesis, electrochemical properties and structural characterization of bis (N-(4-dimethylaminophenyl)-3,5-di-tert-butylsalicylaldiminato)copper(II)
    (2006) Kilinçarslan R.; Karabiyik H.; Ulusoy M.; Aygün M.; Çetinkaya B.; Büyükgüngör O.
    A Cu(II) complex of a Schiff base obtained by the condensation of N,N-dimethyl-1,4-phenylenediamine with 3,5-di-tert-butyl-2-hydroxybenzaldehyde has been synthesized and characterized. The structure of the complex was determined by single-crystal X-ray methods. The four-coordinate Cu(II) ion possesses a compressed tetrahedral coordination environment. © 2006 Taylor & Francis.
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    The Synthesis, Structural Characterization and Conformational Analysis of (1,3-Bis(2-methyl-4-diethylaminophenyl)imidazolidin-2-ylidene)chloro(1, 5-cyclooctadiene)rhodium(I)
    (2005) Karabiyik H.; Kilinçarslan R.; Aygün M.; Çetinkaya B.; Büyükgüngör O.
    A four-coordinated Rh(I) complex with a new heterocyclic carbene ligand, functionalized by amino donor pendants, 4, was synthesized and characterized by elemental analyses, NMR and IR spectroscopy, and the molecular structure of the title compound has been determined by X-ray crystallography. Crystallographic data: monoclinic, P21/m, a = 7.9307(5), b = 25.0061(12), c = 8.0780(6) Å, ß = 101.366(6)°, V = 1570.58(17) Å3, ?calc = 1.3515(1) g cm-3, Z = 2. The experimentally obtained structural parameters for compound 4 compare reasonably well with those calculated at the semi-empirical ZINDO/1 level of theory carried out to elucidate conformational flexibility and steric hindrances. © 2005 Verlag der Zeitschrift für Naturforschung.