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Öğe 1,4-diferrocenylbutane-1,4-dione(Blackwell Publishing, 2008) Tombul, Mustafa; Bulut, Adnan; Guven, Kutalmis; Buyukgungor, OrhanIn the crystal structure of the title compound, [Fe-2(C5H5)(2)-(C14H12O2)], each carbonyl group is coplanar with the adjacent cyclopentadienyl ring, thus maximizing the pi-orbital overlap and electronic interactions between the groups. In the crystal structure, there are inter-and intramolecular C-H center dot center dot center dot O contacts.Öğe Crystal structure of caesium(I) hydrogen maleate, Cs(C4H3O4)(Oldenbourg Verlag, 2010) Guven, Kutalmis; Bakir, GamzeC4H3CsO4, orthorhombic, Pnma (no 62), a = 5.597(2) angstrom, b = 8.775(1) angstrom, c = 12 572(2) angstrom, V = 617.4 angstrom 3, Z = 4, Rgt(F) = 0.029, wR(ref)(F-2) = 0080, T = 298 K.Öğe Crystal structure of dimethylammonium bis(naphthalene-2,3-diolato) borate, C22H20BNO4(Walter De Gruyter Gmbh, 2018) Tombul, Mustafa; Guven, Kutalmis; Bulut, Adnan; Svoboda, Ingrid; Fuess, HartmutC22H20BNO4, monoclinic, C2/c (no. 15), a = 32.303(4) angstrom, b = 8.2703(6) angstrom, c = 7.3876(6) angstrom, beta = 92.889(8)degrees, V = 1971.1(3) angstrom(3), Z = 4, R-gt(F) = 0.0978, wR(ref)(F-2) = 0.2063, T = 298 K.Öğe Crystal structure of pyridinium bis(naphthalane2,3-diolato-κ 2O,O′)borate monohydrate, C25H20BNO5(Walter De Gruyter Gmbh, 2017) Tombul, Mustafa; Guven, Kutalmis; Svoboda, Ingrid; Fuess, HartmutC25H20BNO5, triclinic, P (1) over bar (no. 2), a = 7.0868(6)angstrom, b = 10.3522(6)angstrom, c = 15.3140(10)angstrom, alpha= 74.088(7)degrees, beta= 89.996(7)degrees, gamma = 79.190(1)degrees, V = 1059.71(13)angstrom(3), Z = 2, R-gt(F) = 0.0445, wR(ref)(F-2) = 0.1105, T = 298 K.Öğe Dimethylammonium bis(3-oxido-naphthalene-2-carboxylato)borate hemihydrate(Wiley-Blackwell, 2008) Tombul, Mustafa; Guven, Kutalmis; Svoboda, IngridThe title compound, C2H8N+center dot C(22)H(12)BO6(-)center dot 0.5H(2)O, was synthesized under atmospheric conditions in the presence of dimethylformamide acting as a template. The structure is composed of [NH2(CH3)2](+) cations, bis(3-oxidonaphthalene-2-carboxylato) borate anions and water molecules. The water molecule lies on a twofold rotation axis. The stabilization of the crystal structure comes from electrostatic interactions and is assisted by intermolecular O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds between the layers.Öğe Poly[[diaquacaesium(II)]bis(μ3-3-carboxypyrazine-2-carboxylato)]. Corrigendum(Blackwell Publishing, 2008) Tombul, Mustafa; Guven, Kutalmis; Buyukgungor, Orhan…Öğe Poly[diaqua(μ2-3-carboxypyrazine2-carboxylato)(μ2-pyrazine-2,3-dicarboxylic acid)potassium(I)](Blackwell Publishing, 2008) Tombul, Mustafa; Guven, Kutalmis; Svoboda, IngridThe structural unit of the title compound, [K(C6H3N2O4)(C6H4N2O4)(H2O)(2)](n), consists of one potassium cation, one hydrogen pyrazine-2,3-dicarboxylate anion, one pyrazine-2,3dicarboxylic acid molecule and two water molecules; this is twice the asymmetric unit, since the potassium cation lies on an inversion centre. Each anion or acid molecule is linked to two potassium cations, while the potassium cation has contacts to four symmetry-equivalent organic ligands, with two different coordination modes towards this cation. In addition, each potassium cation is coordinated by two water O atoms, raising the coordination number to eight. One of the carboxyl groups of the acid retains its H atom, which forms a hydrogen bond to a coordinated water molecule. The other carboxyl group is deprotonated in half of the ligands and protonated in the other half, taking part in a strong O-H center dot center dot center dot O hydrogen bond disordered over an inversion centre. The stabilization of the crystal structure is further assisted by O-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen bonds in which water acts as the donor.Öğe Poly[triaquabis-(μ(2)-3-carboxy-pyrazine-2-carboxyl-ato)dilithium(I)](Blackwell Publishing, 2008) Tombul, Mustafa; Guven, Kutalmis; Buyukgungor, OrhanIn the title compound, [Li-2(C6H3N2O4)(2)(H2O)(3)](n), the coordination number for both independent Li+ cations is five. One of the Li+ ions has a distorted trigonal-bipyramidal geometry, coordinated by one of the carboxyl O atoms of a 3-carboxypyrazine-2-carboxylate ligand, two O atoms from two water molecules, and an N and a carboxylate O atom of a second 3-carboxypyrazine-2-carboxylate ligand. The other Li+ ion also has a distorted trigonal-bipyramidal geometry, coordinated by one water molecule and two 3-carboxypyrazine-2-carboxylate ligands through an N and a carboxylate O atom from each. One of the carboxyl groups of the two ligands takes part in an intramolecular O-H center dot center dot center dot O hydrogen bond. The stabilization of the crystal structure is further assisted by O-H center dot center dot center dot O, O-H center dot center dot center dot N and C-H center dot center dot center dot O hydrogen-bonding interactions involving the water molecules and carboxylate O atoms.Öğe Poly[μ-aqua-diaqua(μ2-pyrazine-2,3-dicarboxylato)dilithium(I)](Wiley-Blackwell, 2009) Tombul, Mustafa; Guven, KutalmisThe asymmetric unit of the title compound, [Li-2(C6H2N2O4)(H2O)(3)](n), consists of two independent Li+ cations, one pyrazine-2,3-dicarboxylate dianion and three water molecules. One of the Li+ cations has a distorted tetrahedral geometry, coordinated by one of the carboxylate O atoms of the pyrazine-2,3-dicarboxylate ligand and three O atoms from three water molecules, whereas the other Li+ cation has a distorted trigonal-bipyramidal geometry, coordinated by a carboxylate O atom of a symmetry-related pyrazine-2,3-dicarboxylate ligand, two water molecules and a chelating pyrazine-2,3-dicarboxylate ligand (by utilizing both N and O atoms) of an adjacent molecule. The synthesis of a hydrated polymeric dinuclear lithium complex formed with two pyrazine-2,3-dicarboxylic acid ligands has been reported previously [Tombul et al. (2008a). Acta Cryst. E64, m491-m492]. By comparision to the complex reported here, the dinuclear complex formed with two pyrazine-2,3-dicarboxylic acid ligands differs in the coordination geometry of both Li atoms. The crystal structure further features O-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen-bonding interactions involving the water molecules and carboxylate O atoms.Öğe A Sodium Supported Borate Ester: Synthesis, Spectral Characterization and Crystal Structure of dimeric Sodium Organoborate Complex [Na(py)][B(hyncaH22)2]2(Springer/Plenum Publishers, 2009) Tombul, Mustafa; Guven, Kutalmis; Durlu, Tahsin N.A dimeric sodium supported borate complex, [Na(py)][B(hyncaH(-2))(2)](2) (1) (py = pyridine, hynca = 1-hydroxynaphthalene-2-carboxylic acid), has been synthesised by the reaction of NaBH4 with two equivalents of hynca in anhydrous THF and following crystallization from py/H2O solution afforded borate ester derivative. The complex has been fully characterized by FT-IR in the solid state and by NMR (H-1 and C-13) spectroscopy and electrospray ionization mass spectrometry in solution. The molecular structure of the title compound was determined by single crystal X-ray diffraction. Structure analysis of complex 1 confirmed the presence of an anionic complex [B(hyncaH(-2))(2)](-) in which boron atom is coordinated simultaneously by two hynca ligands utilising both alkoxide and carboxylate groups for bonding. The Na atom is six- coordinate to five O atoms of hydroxy carboxylic acid and one pyridine N atom. Crystal data: crystal system, monoclinic, a = 10.971(3) angstrom, b = 6.839(3) angstrom, c = 30.545(5) angstrom, beta = 92.20(2)degrees, space group P2(1)/c (#14), V = 2,290( 1) angstrom(3), Z = 4.
