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    Öğe
    Crystal structure of 1,3-bis(4-methylbenzyl)-1H-1,3-benzimidazol-3-ium bromide monohydrate
    (Int Union Crystallography, 2015) Celikesir, Sevim Turktekin; Celik, Omer; Akkoc, Senem; Ilhan, Ilhanb Ozer; Gok, Yetkin; Akkurt, Mehmet
    In the title hydrated symetrically substituted 1,3-bis(4-methyl-benzyl) benzimidazolium salt, C23H23N2+center dot Br-center dot H2O, the dihedral angles between the benzimidazole ring system (r.m.s. deviation = 0.003 angstrom) and the pendant benzene rings are 73.18 (16) and 77.52 (16)degrees. Both benzene rings lie to the same side of the benzimidazole ring system, giving the cation an overall U-shape. In the crystal, the cation is linked to the water molecule by a short C-H center dot center dot center dot O hydrogen bond and the water molecule forms O-H center dot center dot center dot Br hydrogen bonds. Together, these interactions lead to [010] chains. The packing is consolidated by C-H center dot center dot center dot Br hydrogen bonds and aromatic pi-pi stacking interactions [centroid-centroid distances = 3.5401 (17) and 3.8815 (18) angstrom], generating a three-dimensional network.
  • [ X ]
    Öğe
    Crystal structure of 1-(4-methoxyphenyl)-4-(4-nitrophenyl)-3-phenoxyazetidin-2-one
    (Int Union Crystallography, 2015) Celikesir, Sevim Turktekin; Akkurt, Mehmet; Jarrahpour, Aliasghar; Shafie, Habib Allah; Celik, Omer
    In the title compound, C22H18N2O5, the central beta-lactam ring (r.m.s. deviation = 0.002 angstrom) makes dihedral angles of 64.21 (14), 82.35 (12) and 20.66 (13)degrees with the phenyl ring and the nitro-and methoxybenzene rings, respectively. The molecular structure is stabilized by an intramolecular C-H center dot center dot center dot O hydrogen bond. In the crystal, molecules are linked via C-H center dot center dot center dot O hydrogen bonds, forming slabs lying parallel to (111). The slabs are linked via C-H center dot center dot center dot pi interactions, forming a three-dimensional network.
  • [ X ]
    Öğe
    Crystal structure of 3-(4-chlorophenoxy)4-(2-nitrophenyl)azetidin-2-one with an unknown solvate
    (Int Union Crystallography, 2015) Celikesir, Sevim Turktekin; Akkurt, Mehmet; Jarrahpour, Aliasghar; Shafie, Habib Allah; Celik, Omer
    In the title compound, C15H11ClN2O4, the central beta-lactam ring is approximately planar [maximum deviation = 0.044 (2) angstrom for the N atom from the mean plane] and subtends dihedral angles of 61.17 (11) and 40.21 (12)degrees, respectively, with the nitro and chlorobenzene rings. Both substituents lie to the same side of the beta-lactam core. In the crystal, N-H center dot center dot center dot O hydrogen bonds link the molecules into C(4) chains propagating in [010]. The chains are cross-linked by C-H center dot center dot center dot O and weak C-H center dot center dot center dot pi interactions, generating a three-dimensional network. The solvent molecules were found to be highly disordered and their contribution to the scattering was removed with the SQUEEZE procedure in PLATON [Spek (2009). Acta Cryst. D65, 148-155], which indicated a solvent cavity of volume 318 angstrom(3) containing approximately 114 electrons. These solvent molecules are not considered in the given chemical formula and other crystal data.