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    11-Butyl-3-methoxy-11H-benzo[a]carbazole
    (Int Union Crystallography, 2010) Ergun, Yavuz; Gundogdu, Cevher; Tercan, Baris; Ermis, Emel; Hokelek, Tuncer
    The title compound, C21H21NO, consists of a carbazole skeleton with a methoxybenzene ring fused to the carbazole, and a butyl group attached to the carbazole N atom. The carbazole skeleton is nearly planar [maximum deviation = 0.078 (2) angstrom], and it is oriented at a dihedral angle of 4.22 (4)degrees with respect to the adjacent methoxybenzene ring.
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    4-[2-(2,2-Dimethyl-4,6-dioxo-1,3-dioxan-5-ylidene)hydrazin-1-yl]benzonitrile
    (Int Union Crystallography, 2010) Colak, Naki; Yildirir, Yilmaz; Tercan, Baris; Ermis, Emel; Hokelek, Tuncer
    In the title compound, C13H11N3O4, the dioxane ring adopts an envelope conformation with the C atom bonded to the dimethyl group in the flap position [deviation = 0.613 (1) angstrom]. The nitrile group and the attached benzene ring are roughly coplanar [maximum deviation = 0.087 (1) angstrom]. An intramolecular N-H center dot center dot center dot O hydrogen bond involving the hydrazinyl group generates an S(6) ring. The N-N and C-N bond lengths indicate that the compound may be a mixture of the azo and hydrazone tautomeric forms but the presence of the N-bound H atom supports the hydrazone form. The crystal structure is stabilized by weak intermolecular C-H center dot center dot center dot O, C-H center dot center dot center dot N and C-H center dot center dot center dot pi interactions.
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    9-Benzyl-9H-carbazole
    (Int Union Crystallography, 2010) Uludag, Nesimi; Ates, Murat; Tercan, Baris; Ermis, Emel; Hoekelek, Tuncer
    The asymmetric unit of the title compound, C19H15N, contains two crystallographically independent molecules. In both molecules, the planar carbazole moieties [maximum deviations = 0.037 (4) and 0.042 (3) angstrom] are oriented with respect to the adjacent benzene rings, at dihedral angles of 85.29 (8) and 89.89 (7)degrees, respectively. In the crystal structure, weak C-H center dot center dot center dot pi interactions are observed involving the carbazole rings.
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    Bis(?-4-methylbenzoato-?2O:O?)bis[aqua(4-methylbenzoato-?2O,O?)zinc(II)]-bis(?-4-methylbenzoato-?2O:O?)bis[(4-methylbenzoato-?O)(nicotinamide-?N)zinc(II)]-water (1/1/2)
    (Wiley-Blackwell, 2010) Hokelek, Tuncer; Ermis, Emel; Tercan, Baris; Cimen, Efdal; Necefoglu, Hacali
    [No abstract available]
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    Diaquabis(4-methylaminobenzoato-?O)bis(nicotinamide-?N1)cobalt(II)
    (Wiley-Blackwell, 2010) Necefoglu, Hacali; Aybirdi, Oezguer; Tercan, Baris; Ermis, Emel; Hokelek, Tuncer
    The asymmetric unit of the title Co-II complex, [Co(C8H8NO2)(2)(C6H6N2O)(2)(H2O)(2)], contains two half complex molecules with similar structures. The Co-II atoms are each located on an inversion center and each is coordinated by two 4-methylaminobenzoate (PMAB), two nicotinamide (NA) ligands and two water molecules in a distorted octahedral coordination. The dihedral angles between the carboxylate groups and the adjacent benzene rings are 3.0 (3) and 2.54 (19)degrees, while the pyridine and benzene rings are oriented at dihedral angles of 67.40 (8) and 66.25 (8)degrees. In the crystal structure, intermolecular 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.
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    Diaquabis(4-methylbenzoato-?O)bis(nicotinamide-?N1)nickel(II)
    (Int Union Crystallography, 2010) Necefoglu, Hacali; Cimen, Efdal; Tercan, Baris; Ermis, Emel; Hokelek, Tuncer
    The title Ni-II complex, [Ni(C8H7O2)(2)(C6H6N2O)(2)(H2O)(2)], is centrosymmetric with the Ni atom located on an inversion center. The molecule contains two 4-methylbenzoate (PMB) and two nicotinamide (NA)ligands and two coordinated water molecules, all ligands 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 26.15 (10)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 87.81 (4)degrees. In the crystal structure, intermolecular 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 three-dimensional network. The pi-pi contact between the benzene rings [centroid-centroid distance = 3.896 (1) angstrom] may further stabilize the crystal structure. A weak C-H center dot center dot center dot pi interaction involving the pyridine ring also occurs.
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    Diaquabis(N,N-diethylnicotinamide-?N1)bis(4-methylbenzoato-?O)cobalt(II)
    (Wiley-Blackwell, 2010) Necefoglu, Hacali; Cimen, Efdal; Tercan, Baris; Ermis, Emel; Hokelek, Tuncer
    In the centrosymmetric mononuclear title complex, [Co(C8H7O2)(2)(C10H14N2O)(2)(H2O)(2)], the Co-II ion is located on an inversion center. The asymmetric unit contains one 4-methylbenzoate (PMB)anion, one N,N-diethylnicotinamide (DENA)ligand and one coordinated water molecule. The four O atoms in the equatorial plane around the Co-II ion form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two pyridine N atoms of the DENA ligands in the axial positions. The dihedral angle between the carboxylate group and the attached benzene ring is 3.73 (14)degrees, while the pyridine and benzene rings are oriented at a dihedral angle of 77.28 (6)degrees. In the crystal structure, intermolecular O-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds link the molecules into a twodimensional network parallel to (001). The structure is further stabilized by pi-pi contacts between the pyridine rings [centroid-centroid distance = 3.544 (1)angstrom] and weak C-H center dot center dot center dot pi interactions involving the benzene ring.