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  • Küçük Resim
    Öğe
    Crystal structure and Hirshfeld surface analysis of diiodido(N '-[(E)-(phenyl)(pyridin-2-yl-kappa N)methyl-idene]pyridine-2-carbohydrazide-kappa N-2 ',O}-cadmium(II)
    (2019) Atioğlu, Zeliha; Afkhami, Farhad Akbari; Akkurt, Mehmet; Khandar, Ali Akbar; Choquesillo-Lazarte, Duane
    In each of the two independent mol­ecules in the asymmetric unit of the title compound, [CdI2(C18H14N4O)], the N,O,N?-tridentate N?-[(E)-(phen­yl)(pyridin-2-yl-?N)methyl­idene]pyridine-2-carbohydrazide ligand and two iodide anions form an I2N2O penta­coordination sphere, with a distorted square-pyramidal geometry, with an I atom in the apical position. Both mol­ecules feature an intra­molecular N—H?N hydrogen bond. In the crystal, weak aromatic ?–? stacking inter­actions [centroid–centroid separation = 3.830?(2)?Å] link the mol­ecules into dimers.
  • 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).