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    Crystal structure of bis-{ N'-[( E)-4-hy-droxy-benzyl-idene]pyridine-4-carbohydrazide-? N1}di-iodidocadmium methanol disolvate
    (2017) Afkhami, Farhad Akbari; Krautscheid, Harald; Atioğlu, Zeliha; Akkurt, Mehmet
    In the title compound, [Cd(C13H11IN3O2)2]·2CH3OH, which crystallizes with Z = 4 in the space group Pbcn, the CdII atom is located on a twofold rotation axis and coordinated by two I- anions and two N atoms from the pyridine rings of the two N'-[(E)-4-hy-droxy-benzyl-idene]pyridine-4-carbohydrazide ligands. The geometry around the CdII atom is distorted tetra-hedral, with bond angles in the range 94.92 (11)-124.29 (2)°. The iodide anions undergo inter-molecular hydrogen-bonding contacts with the C-H groups of the organic ligands of an adjacent complex mol-ecule, generating a chain structure along the b axis. Furthermore, an extensive series of O-H?O, N-H?O and C-H?O hydrogen-bonding inter-actions involving both the complex mol-ecules and the ethanol solvate mol-ecules generate a three-dimensional network.
  • Küçük Resim
    Öğe
    Crystal structures of di-bromido-{ N-[(pyridin-2-yl-? N)methyl-idene]picolinohydrazide-? 2N', O}cadmium methanol monosolvate and di-iodido{ N-[(pyridin-2-yl-? N)methyl-idene]picolinohydrazide-? 2N', O}cadmium
    (2017) Khandar, Ali Akbar; Afkhami, Farhad Akbari; Krautscheid, Harald; Kristoffersen, Kenneth Aase; Atioğlu, Zeliha; Akkurt, Mehmet; Görbitz, Carl Henrik
    The title compounds, [CdBr2(C12H10N4O)]·CH3OH, (I), and [CdI2(C12H10N4O)], (II), are cadmium bromide and cadmium iodide complexes of the ligand (E)-N'-(pyridin-2-yl-methyl-ene)picolinohydrazide. Complex (I) crystallizes as the methanol monosolvate. In both compounds, the Cd2+ cation is ligated by one O atom and two N atoms of the tridentate ligand, and by two bromide anions forming a Br2N2O penta-coordination sphere for (I), and by two iodide anions forming an I2N2O penta-coordination sphere for (II), both with a distorted square-pyramidal geometry. In the crystal of complex (I), mol-ecules are linked by pairs of N-H?O and O-H?Br hydrogen bonds, involving the solvent mol-ecule, forming dimeric units, which are linked by C-H?Br hydrogen bonds forming layers parallel to (101). In the crystal of complex (II), mol-ecules are linked by N-H?I hydrogen bonds, forming chains propagating along [010]. In complex (II), measured at room temperature, the two iodide anions are each disordered over two sites; the refined occupancy ratio is 0.75 (2):0.25 (2).