Yazar "Ozbek, F. Elif" seçeneğine göre listele

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    Bis(?-2-fluorobenzoato-1:2?2O:O?)(2-fluorobenzoato-1?2O,O?)(2-fluorobenzoato-2?O)dinicotinamide-1?N1,2?N1-dizinc(II)-2-fluorobenzoic acid (1/1)
    (Int Union Crystallography, 2009) Hokelek, Tuncer; Yilmaz, Filiz; Tercan, Baris; Ozbek, F. Elif; Necefoglu, Hacali
    The asymmetric unit of the title compound, [Zn-2(C7H4FO2)(4)(C6H6N2O)(2)]center dot C7H5FO2, consists of a binuclear Zn-II complex bridged by two carboxyl groups of 2-fluorobenzoate (FB) anions and a 2-fluorobenzoic acid molecule. The two bridging FB anions, one chelating FB anion and one nicotinamide (NA) ligand coordinate to one Zn cation with a distorted square-pyramidal geometry, while the two bridging FB anions, one monodentate FB anion and one NA ligand coordinate to the other Zn cation with a distorted tetrahedral geometry. Within the binuclear molecule, the pyridine rings are oriented at a dihedral angle of 19.41 (14)degrees. In the crystal structure, the uncoordinated 2-fluorobenzoic acid molecules are linked by O-H center dot center dot center dot O hydrogen bonding, forming centrosymmetric supramolecular dimers. Intermolecular N-H center dot center dot center dot O hydrogen bonds link the complex molecules into a three-dimensional network. The pi-pi contacts between nearly parallel pyridine and benzene rings [dihedral angles of 19.41 (14) and 12.72 (16)degrees, respectively, centroid-centroid distances = 3.701 (2) and 3.857 (3) angstrom] may further stabilize the crystal structure. The fluorine atoms in two FB ligands are disordered over two positions, with occupancy ratios of 0.70:0.30.
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    Diaquabis(2-bromobenzoato-?O)bis(N,N-diethylnicotinamide-?N1)manganese(II)
    (Int Union Crystallography, 2009) Hokelek, Tuncer; Dal, Hakan; Tercan, Baris; Ozbek, F. Elif; Necefoglu, Hacali
    The title Mn-II complex, [Mn(C7H4BrO2)(2)(C10H14N2O)(2)(H2O)(2)], is centrosymmetric. The molecule contains two 2-bromobenzoate (BB) and two diethylnicotinamide (DENA) ligands and two water molecules, all ligands being monodentate. The four O atoms in the equatorial plane around the Mn atom form a slightly distorted square-planar arrangement, while the distorted octahedral coordination is completed by the two N atoms of the DENA ligands in the axial positions. The dihedral angle between the carboxyl group and the adjacent benzene ring is 79.95 (11)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 45.66 (6)degrees. In the crystal structure, intermolecular O-H center dot center dot center dot O hydrogen bonds link the molecules into infinite chains.
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    Diaquabis(2-bromobenzoato-?O)bis(N,N-diethylnicotinamide-?N1)nickel(II)
    (Int Union Crystallography, 2009) Hokelek, Tuncer; Yilmaz, Filiz; Tercan, Baris; Ozbek, F. Elif; Necefoglu, Hacali
    In the monomeric centrosymmetric title Ni-II complex, [Ni(C7H4BrO2)(2)(C10H14N2O)(2)(H2O)(2)], the Ni-II ion is located on an inversion center. The asymmetric unit contains one 2-bromobenzoate ligand, one diethylnicotinamide (DENA) ligand and one coordinated water molecule. The four O atoms in the equatorial plane around the Ni-II ion form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by two N atoms of two DENA ligands in the axial positions. The dihedral angle between the benzene ring and the attached carboxylate group is 87.73 (15)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 42.48 (7)degrees. In the crystal structure, O-H center dot center dot center dot O hydrogen bonds link the molecules into a two-dimensional network parallel to (10 (1) over bar). In addition, C-H center dot center dot center dot O hydrogen bonds are observed.
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    Diaquabis(2-bromobenzoato-?O)bis(N,N-diethylnicotinamide-?N1)zinc(II)
    (Int Union Crystallography, 2009) Hokelek, Tuncer; Dal, Hakan; Tercan, Baris; Ozbek, F. Elif; Necefoglu, Hacali
    In the centrosymmetric title complex, [Zn(C7H4BrO2)(2)(-)(C10H14N2O)(2)(H2O)(2)], the Zn-II atom is located on an inversion center. The asymmetric unit contains one 2- bromobenzoate (BB), one diethylnicotinamide (DENA) ligand and one coordinating water molecule. The four O atoms in the equatorial plane around the Zn atom form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two N atoms of the DENA ligands in the axial positions. The dihedral angle between the carboxyl group and the adjacent benzene ring is 85.51 (12)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 44.07 (6)degrees. In the crystal structure, O-H center dot center dot center dot O hydrogen bonds link the molecules into infinite chains.
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    Diaquabis(2-bromobenzoato-?O)bis(nicotinamide-?N1)nickel(II)
    (Int Union Crystallography, 2009) Hokelek, Tuncer; Yilmaz, Filiz; Tercan, Baris; Ozbek, F. Elif; Necefoglu, Hacali
    The title Ni-II complex, [Ni(C7H4BrO2)(2)(C6H6N2O)(2)(H2O)(2)], is centrosymmetric. It contains two 2-bromobenzoate (BB) ligands, two nicotinamide (NA) ligands and two water molecules, all of them being monodentate. The four O atoms in the equatorial plane around the Ni atom form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxylate group and the adjacent benzene ring is 30.81 (17)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 84.66 (6)degrees. In the crystal structure, O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds link the molecules into a supramolecular structure. A weak C-H center dot center dot center dot pi interaction is also found.
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    Diaquabis(2-bromobenzoato-?O)bis(nicotinamide-?N1)zinc(II)
    (Int Union Crystallography, 2009) Hokelek, Tuncer; Dal, Hakan; Tercan, Baris; Ozbek, F. Elif; Necefoglu, Hacali
    The title Zn-II complex, [Zn(C7H4BrO2)(2)(C6H6N2O)(2)(H2O)(2)], is centrosymmetric with the Zn atom on an inversion center. The molecule contains two 2-bromobenzoate (BB) and two nicotinamide (NA) ligands and two coordinated water molecules, all ligands being monodentate. The four O atoms in the equatorial plane around the Zn atom form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxyl group and the adjacent benzene ring is 31.14 (12)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 83.54 (5)degrees. In the crystal structure, O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds link the molecules into infinite chains. A weak C-H center dot center dot center dot pi interaction is also present.
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    Diaquabis(2-chlorobenzoato-?O)bis(N,N-diethylnicotinamide-?N1)nickel(II)
    (Int Union Crystallography, 2009) Hokelek, Tuncer; Dal, Hakan; Tercan, Baris; Ozbek, F. Elif; Necefoglu, Hacali
    In the monomeric and centrosymmetric title Ni-II complex, [Ni(C7H4ClO2)(2)(C10H14N2O)(2)(H2O)(2)], the Ni-II ion is located on an inversion center. The asymmetric unit contains one 2-chlorobenzoate ligand, one diethylnicotinamide (DENA) ligand and one coordinating water molecule, the ligands being monodentate. The four O atoms in the equatorial plane around the Ni-II ion form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by two N atoms of the DENA ligands in axial positions. The dihedral angle between the benzene ring and the attached carboxylate group is 87.36 (10)degrees, while the pyridine and benzene rings are oriented at an angle of 41.90 (5)degrees. In the crystal structure, intermolecular O-H center dot center dot center dot O hydrogen bonds link the molecules into a two-dimensional network parallel to (10 (1) over bar).
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    Tetraaquabis(nicotinamide-?N1)cobalt(II) bis(2-fluorobenzoate)
    (Int Union Crystallography, 2009) Ozbek, F. Elif; Tercan, Baris; Sahin, Ertan; Necefoglu, Hacali; Hokelek, Tuncer
    The title complex, [Co(C6H6N2O)(2)(H2O)(4)](C7H4FO2)(2), contains one Co(II) atom (site symmetry (1) over bar), two monodentate nicotinamide (NA) ligands, four coordinated water molecules and two 2-fluorobenzoate (FB) anions. The four O atoms in the equatorial plane around the Co atom form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxyl group and the adjacent benzene ring is 29.8 (3)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 7.97 (12)degrees. In the crystal structure, molecules are linked by O-H center dot center dot center dot O, N-H center dot center dot center dot O and N-H center dot center dot center dot F hydrogen bonds, forming an infinite three-dimensional network. pi-pi Contacts between the pyridine and benzene rings [centroid-centroid distance = 3.673 (3) angstrom] may further stabilize the crystal structure.
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    Tetraaquabis(nicotinamide-?N1)nickel(II) bis(2-fluorobenzoate)
    (Int Union Crystallography, 2009) Hokelek, Tuncer; Dal, Hakan; Tercan, Baris; Ozbek, F. Elif; Necefoglu, Hacali
    The asymmetric unit of the title complex, [Ni(C6H6N2O)(2)(H2O)(4)](C7H4FO2)(2), contains one-half of the complex cation with the Ni-II atom located on an inversion center, and a 2-fluorobenzoate (FB) counter-anion. The four O atoms in the equatorial plane around the Ni atom form a slightly distorted square-planar arrangement with an average Ni-O bond length of 2.079 angstrom, and the slightly distorted octahedral coordination is completed by the two N atoms of the nicotinamide (NA) ligands in the axial positions. The dihedral angle between the carboxyl group and the attached benzene ring is 28.28 (11)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 8.31 (4)degrees. In the crystal structure, O-H center dot center dot center dot O, N-H center dot center dot center dot O, C-H center dot center dot center dot O, and C-H center dot center dot center dot F hydrogen bonds link the molecules into a three-dimensional network. pi-pi Contacts between the pyridine and benzene rings [centroid-centroid distance = 3.626 (1) angstrom] may further stabilize the crystal structure. The 2-fluorobenzoate anion is disordered over two orientations, with an occupancy ratio of 0.85:0.15.