Bekir Çetinkaya

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An efficient and stereoselective catalytic system for the Heck cross coupling reaction using novel 1,3-dialkyl-3,4,5,6-tetrahydropyrimidinium salts (1, LHX) and Pd(OAc)2 loading has been reported. The palladium complexes derived from the salts 1a-f prepared in situ exhibit good catalytic activity in the Heck coupling reaction of aryl bromides under mild(More)
In the title compound, C(25)H(35)N(2) (+)·Cl(-)·H(2)O, 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(More)
The title N-heterocyclic carbene derivative, C(23)H(30)N(5) (+)·Br(-)·0.25H(2)O, was synthesized using microwave heating and was characterized by (1)H and (13)C NMR spectroscopy and a single-crystal X-ray diffraction study. The structure of the title compound are stabilized by a network of intra- and inter-molecular C-H⋯Br hydrogen-bonding inter-actions.(More)
The asymmetric unit of the title compound, (C(13)H(15)N(2)S(2))[RuCl(3)(C(10)H(14))], contains a 1,3-(2-thienylmeth-yl)-4,5-dihydro-imidazolium cation and a trichlorido(η(6)-p-cymene)ruthenate(II) anion. The thio-phene rings of the cation are disordered by an 180° rotation about the thio-phene-CH(2) bonds with occupancies of 0.847 (5)/0.153 (5) and 0.700(More)
The title complex, [RuCl(2)(C(25)H(26)N(2))]·CH(2)Cl(2), 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 C(6)H(2)(CH(3))(3) arene(More)
The asymmetric unit of the title compound, (C(14)H(17)N(2)S(2))[Ru(C(10)H(14))Cl(3)], contains a 1,3-bis-(thio-phen-2-ylmeth-yl)-3,4,5,6-tetra-hydro-pyrimidinium cation and a trichlorido(η(6)-p-cymene)ruthenate(II) anion. The Ru atom exhibits a distorted octa-hedral coordination with the benzene ring of the p-cymene ligand formally occupying three sites and(More)
The title N-heterocyclic carbene derivative, C(23)H(33)N(4) (+)·Cl(-), has been synthesized and characterized by elemental analysis, (1)H and (13)C NMR, IR spectroscopy and a single-crystal X-ray diffraction study. Ions of the title compound are linked by three C-H⋯Cl inter-actions. The seven-membered 1,3-diazepane ring has a form inter-mediate between(More)
In the title compound, C 37 H 53 N 5 O 2 , the benzene rings make dihedral angles of 84.61 (8) and 67.10 (9) with the pyridine ring. The crystal structure is stabilized by strong intra-molecular interactions. The two (2-methoxyethyl)amine groups are disordered over two positions; the site occupancies are ca 0.6 and 0.4.
A novel N-heterocyclic carbene derivative, C(28)H(33)N(2)O(3) (+)·Br(-)·H(2)O, was synthesized and characterized by elemental analysis, (1)H and (13)C-NMR and IR spectroscopy and a single-crystal X-ray diffraction study. Ions of the title compound are linked by π⋯π stacking inter-actions (face-face separation 3.441 Å) and C-H⋯Br and O-H⋯Br inter-actions.(More)