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Öğe Crystal and molecular structures of 1-[3-(3,4-dimethoxyphenyl)-2-propenoyl]pyrrolidine(Japan Soc Analytical Chemistry, 2003) Tarimci, C.; Karamustafa, A.; Güven, K.; Kabak, M.; Yesilada, A.The crystal structure of 1-[3-(3,4-dimethoxyphenyl)-2-propenoyl]pyrrolidine (C15H19NO3) (I) has been determined by X-ray analysis. It crystallizes orthorhombic space group Pbca with a = 24.295(3), b = 15.086(3), c = 7.552(3)A, V = 2768(1)Angstrom(3), Z = 8, D-calc = 1.254 g/cm(3), mu = (Mo K-alpha) = 0.87 cm(-1). The title compound has analgesic activity of cycloaliphatic amine part. The molecule is deviated from planar configuration.Öğe Crystal structure and physico-chemical properties of diaquabis(1,10-phenanthroline)manganese(II) disaccharinate monohydrate(Elsevier Science Bv, 2001) Yılmaz, VT..; Yiımaz, F.; Topcu, Y.; Andac, O.; Güven, K.A novel manganese complex, [Mn(phen)(2)(H2O)(2)](sac)(2).H2O, was synthesized by the reaction of [Mn(sac)(2)(H2O)(4)]. 2H(2)O with 1,10-phenantroline in aqueous solution and characterized by elemental analysis, IR spectral evidence, magnetic measurements, thermal analysis and single crystal X-ray diffraction. The compound crystallizes in triclinic system, space group P-1, with Z = 2. The saccharinate ions do not coordinate the central metal, instead are present as the complementary anions. In the complex cation, Mn(II) is coordinated by two phen and two aqua ligands, and exhibits a distorted octahedral coordination with a high-spin configuration. The presence of lattice and coordinate water molecules are also confirmed by thermal analysis and IR spectroscopy. (C) 2001 Elsevier Science B.V. All rights reserved.Öğe Crystal structure of 1-ferrocenyl-(3-methyl-1-phenylaziridin-2-yl)-methanone, (C5H5)Fe(C16H16NO)(2005) Bulut, Adnan; Güven, K.; Dogan, Özdemir; Zeytinci, S.C21H21FeNO, monoclinic, P121/a1 (no. 14), a = 7.329(7) Å, b = 17.343(3) Å, c = 13.618(5) Å, ? = 95.02°, V = 1724.3 Å3, Z = 4, Rgt(F) = 0.044, wRref(F2) = 0.111, T= 293 K. © 2005, Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München. All rights reserved.Öğe Crystal structure of 4-(1-methyl-1-mesitylcyclobutane-3-yl)-2-aminothiazole(Wiley-V C H Verlag Gmbh, 2006) Aksoy, I.; Yılmaz, I.; Sarı, U.; Güven, K.; Çukurovalı, A.The crystal structure of 4-(1-methyl-1-mesityleyclobutane-3-yl)-2-aminothiazole (C17H22N2S1) has been determined by X-ray crystallographic techniques. The compound crystallizes in the triclinic space group P-1 with Z = 6. The crystal structure was solved by direct methods and refined by full-matrix least squares to a final R-value of 0.052 for 2298 observed reflections [I > 2 sigma (I)]. There are three crystallographically independent molecules, I, II and III. These molecules are held together by intermolecular N-H...N hydrogen bonds.Öğe Crystal structure of a-phenyl-N-thioacetylmorpholine(Japan Society for Analytical Chemistry, 2004) Çelik, I.; Akkurt, M.; Demirtaş, I.; Erenler, R.; Güven, K.The title compound, C12H15NOS, consists of a thioamid and an ?-substituted phenyl group. It crystallizes in the monoclinic space group P21/c. The unit-cell parameters at 293 K are a = 6.553(5), b = 23.362(5), c = 8.201(5)Å, ? = 112.532(5)°, V = 1159.7(12)Å3, Dx = 1.268 g/cm3, Z = 4. The morpholine group takes a chair conformation. 2004 © The Japan Society for Analytical Chemistry.Öğe The Di-π-methane Photorearrangement of 2,3-Disubstituted Benzobarrelenes and Benzonorbornadiene − Substituent Effects in Regioselectivity(Wiley-V C H Verlag Gmbh, 2002) Altundaş, R.; Dastan, A.; Ünaldi, N.S.; Güven, K.; Uzun, O.; Balci, M.2,3-Disubstituted benzobarrelene and benzonorbornadiene derivatives 16, 17, and 18, containing electron-withdrawing and electron-donating substituents, have been synthesized and subjected to triplet-sensitized photoisomerization. Methyl 3-methyl-2-benzobarrelenecarboxylate (16) gave two di-pi-methane rearrangement products. However, methyl 3-cyano-2-benzobarrelenecarboxyidte (17) underwent an intramolecular [2(pi) + 2(pi)] cycloaddition reaction, whilst methyl 3cyano-2-benzonorbornadienecarboxylate (18) formed dimer 40. The formation of these products is discussed in terms of the radical stabilizing effect of the substituents and the destabitizing effect on the formation of cyclopropane ring.Öğe Poly[μ-aqua-aqua-μ-3-carboxypyrazine-2-carboxylato-sodium(I)](Int Union Crystallography, 2006) Tombul, M.; Güven, K.; Alkış, N.The crystal structure of the title compound, [Na(C6H3N2O4)(H2O)(2)](n), consists of molecular ribbons containing octahedral NaO5N units. Two adjacent Na atoms are bridged by two water molecules to give a centrosymmetric dimeric unit. Each Na centre is coordinated by two carboxylate groups. The ligand also uses one N atom to coordinate to Na. In addition, each Na atom is coordinated by one water O atom, raising the coordination number to six. One of the carboxyl groups retains its H atom, which takes part in an O-H center dot center dot center dot O [O center dot center dot center dot O = 2.563 (1) angstrom] intramolecular hydrogen bond.Öğe Synthesis, spectroscopic studies, crystal structure and conformation analysis of N-(2-fluoro-3-methoxy)-salicylaldimine(Walter De Gruyter Gmbh, 2002) Ünver, H.; Kendi, E.; Güven, K.; Durlu, T.N.The new Schiff base ligand N-(2-fluoro-3-methoxy)-salicylaldimine (C14H12NO2F) (1) has been synthesised and studied by using, IR, H-1 NMR, C-13 NMR, UV-visible, GGMS techniques, X-ray structure analysis and AM1 semi-empirical quantum mechanical methods. Compound I crystallises in the orthorhombic space group P2(1)2(1)2(1) with a = 12.5461(1), b = 18.0495(1), c = 5.2615(1) Angstrom. An intramolecular hydrogen bond connects O1 and N1 [2.575(2) Angstrom], the hydrogen atom being bonded essentially to the oxygen atom. Minimum energy conformations were calculated as a function of two torsion angles theta(1) (C6-C7-C8-N1) and theta(2) (C7-C8-N1-C9), varied every 10 degrees. The optimized geometry of the crystal structure corresponding to the non-planar conformation is the most stable conformation in all calculations. The results strongly indicate that the minimum energy conformation is primarily determined by hydrogen-hydrogen repulsions between the ortho-hydrogen atoms on the aldehyde rings. Complementary IR, H-1 NMR and UV measurements in solution and in the solid state were carried out.Öğe A Three Dimensional Lead(II) Polymer with Bridging Saccharinate and Unusually Coordinated Acetate Ligands Synthesis, IR Spectra, and Crystal Structure of [Pb(H2O)(µ-OAc)(µ-sac)]n(Wiley-V C H Verlag Gmbh, 2003) Yilmaz, V.T.; Hamamci, S.; Andaç, O.; Güven, K.The complex [Pb(H2O)(mu-OAc)(mu-sac)]n with acetate (OAc) and saccharinate (sac) ligands was characterized by IR, elemental analysis and X-ray crystallography The mixed-anion lead(II) complex crystallizes in the triclinic crystal system with the space group of P1. The single crystal X-ray analysis shows that the complex is a coordination polymer in which the lead(II) ions have a highly distorted pentagonal bipyramidal coordination geometry. Lead(II) ions are bridged by carboxylate groups in a zigzag arrangement forming one-dimensional infinite chains, which are also linked by sac bridges and aromatic pi-pi contacts between the adjacent phenyl rings of sac ligands, resulting in a three-dimensional network. One water molecule coordinates the lead(II) ion and also forms weak hydrogen bonds with the sulfonyl oxygen atoms of the neighboring sac ligands. The sac ligand acts as a bridging ligand through the nitrogen and carbonyl oxygen atoms, while the carboxylate moiety of the acetate ligand shows an unusual (bidentate, and bridging) coordination behaviour, which was observed for the first time in the structure.
