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    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.