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    Structure of 2-(2 '-cyano-2 '-ethoxycarbonylethylenyl)-pyridine
    (Oldenbourg Verlag, 1998) Öztürk, Sema; Akkurt, Mehmet; Kendi, Engin; Kepez, Mustafa
    C11H10N2O2 crystallizes triclinically, space group , Z = 2; a = 8.261(1) Angstrom, b = 8.478(1) Angstrom, c = 8.470(1) Angstrom, alpha = 72.49(1)degrees, beta = 89.58(1)degrees, gamma = 67.56(1)degrees, R = 0.068 for 549 observed reflections [I greater than or equal to 2 sigma(1)]. The molecule of the title compound is nearly planar. The dihedral angle between the weighted least-squares plane through the non-Il atoms of the pyridine ring (maximum deviation from planarity 0.012(2) Angstrom) and the weighted least squares plane through the remaining non-H atoms of the molecule (maximum deviation from planarity 0.027(2) Angstrom) is 3.91(5)degrees.
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    Structure of 2-(2?-cyano-2?-ethoxycarbonylethylenyl)-pyridine
    (1998) Öztürk, Sema; Akkurt, Mehmet; Kendi, Engin; Kepez, Mustafa
    C11H10N2O2 crystallizes triclinically, space group P1?, Z = 2; a = 8.261(1) Å, b = 8.478(1) Å, c = 8.470(1) Å, ? = 72.49(1)°, ? = 89.58(1)°, ? = 67.56(1)°, R = 0.068 for 549 observed reflections [I ? 2?(I)]. The molecule of the title compound is nearly planar. The dihedral angle between the weighted least-squares plane through the non-H atoms of the pyridine ring (maximum deviation from planarity 0.012(2) Å) and the weighted least squares plane through the remaining non-H atoms of the molecule (maximum deviation from planarity 0.027(2) Å) is 3.91(5)°.
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    Synthesis, crystal structure, thermal behavior and IR characterization of pentacarbonyl(4-methylpyridine)chromium(0) complex
    (Springer/Plenum Publishers, 2008) Morkan, İzzet Amour; Morkan, Ayşe Uztetik; Tuç, Çiğdem; Kendi, Engin
    Pentacarbonyl(4-methylpyridine)chromium(0) complex was isolated from n-hexane solution as yellow plate-like crystals and characterized by using X-ray crystallography. It crystallizes in the orthorhombic system with the space group Cmcm and Z = 4. The unit cell parameters are a = 11.737(1) angstrom, b = 12.857(2) angstrom, c = 8.465(1) angstrom. The single crystal X-ray structure of the complex shows that the coordination sphere around the chromium central atom is slightly distorted octahedron, involving the 4-methylpyridine (4-mp), ligand as a monodentate N-donor ligand and five carbonyl groups. The four equatorial CO groups in the complex, with the Cr-C2 distance of 1.886 angstrom, are slightly bent away from the 4-methylpyridine ligand with the N-Cr-C2 angle of 91.69. The pyridine ring plane makes an angle of 135.17 with the Cr-N-CO bond axis. The thermal analysis (differential thermal analysis and thermal gravimetry) and IR spectra of the complex indicated that the compound undergoes complete decomposition to form the Cr2O3 as the final decomposition product.