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    1,3-Bis(2-thienylmeth-yl)-4,5-dihydro-imidazolium trichlorido( 6-p-cymene)ruthenate(II)
    (2009) Arslan H.; Vanderveer D.; Zdemir S.; Gürbüz N.; Gök Y.; Etinkaya B.
    The asymmetric unit of the title compound, (C13H15N2S2)[RuCl3(C10H14)], contains a 1,3-(2-thienylmeth-yl)-4,5-dihydro-imidazolium cation and a trichlorido( 6-p-cymene)ruthenate(II) anion. The thio-phene rings of the cation are disordered by an 180° rotation about the thio-phene-CH2 bonds with occupancies of 0.847 (5)/0.153 (5) and 0.700 (5)/0.300 (5), respectively. The Ru atom exhibits a distorted octa-hedral coordination with the benzene ring of the p-cymene ligand formally occupying three sites and three Cl atoms occupying the other three sites. The short C - N bond lengths in the imidazoline ring indicate partial electron delocalization within the N - C - N fragment. Cation and anions are connected through five inter-molecular C - H?Cl hydrogen bonds and one C - H?? hydrogen bond, forming a three-dimensional hydrogen-bonded network.
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    1,3-Bis(4-tert-butyl-benz-yl)-4,5-dihydro-imidazolium chloride monohydrate
    (2009) Arslan H.; Vanderveer D.; Yaar S.; Zdemir S.; Etinkaya B.
    In the title compound, C25H35N2 +·Cl -·H2O, the imidazolidine ring adopts a twisted conformation, with a pseudo-twofold axis passing through the N - C - N carbon and the opposite C - C bond. The N - C - N fragment of the imidazolidine ring shows some degree of both double- and single-bond character due to partial electron delocalization. One of the tert-butyl groups is disordered over two conformations with occupancies of 0.714 (8) and 0.286 (8). In the crystal, O - H?Cl and C - H?O hydrogen bonds help to establish the packing.
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    Dichlorido[1-(2-methyl-benz-yl)-3-(?6-2,4, 6-trimethyl-benz-yl)-1H-2,3-dihydro-benzimidazol-2-yl-idene]ruthenium(II) dichloro-methane solvate
    (2009) Arslan H.; Vanderveer D.; Yaar S.; Zdemir I.; Etinkaya B.
    The title complex, [RuClCl]·CHl is best thought of as containing an octa-hedrally coordinated Ru center with the arene occupying three sites. Two Ru - Cl bonds and one Ru-carbene bond complete the distorted octa-hedron. The carbene portion of the ligand is a benzimidazole ring. This ring is connected to the CCHarene group by a CHbridge. This leads to a system with very little apparent strain. A dichloro-methane solvent mol-ecule completes the crystal structure. Further stabilization is accomplished via C - H?N and C - H?Cl interactions.
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    Synthesis, characterization, and reactivity of ruthenium(II) complexes containing ? 6-arene-? 1-pyrazole ligands
    (2012) Krkar B.T.; Türkmen H.; Kani I.; Etinkaya B.
    New ruthenium(II) complexes containing ? 6-arene- ? 1-pyrazole ligands were synthesized and characterized by elemental analysis and spectroscopic methods. In addition, the molecular structure of dichloro-3,5-dimethyl-1-(pentamethylbenzyl)-pyrazole-ruthenium(II), [Ru]L 3b, was determined by X-ray diffraction studies. These complexes were applied in the transfer hydrogenation of acetophenone by isopropanol in the presence of potassium hydroxide. The activities of the catalysts were monitored by NMR. © 2012 Elsevier Ltd.