Crystal structure of bis-{N'-[(E)-4-hy-droxy-benzyl-idene]pyridine-4-carbohydrazide-κN1}di-iodidocadmium methanol disolvate.

Harald Krautscheid,Zeliha Atioğlu,Farhad Akbari Afkhami,Mehmet Akkurt

doi:10.1107/s2056989016019575

Abstract

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.

Highlights

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 N0 -[(E)-4-hydroxybenzylidene]pyridine-4-carbohydrazide ligands
Hydrazone ligands based on pyridine are among the most important classes of flexible and versatile polydentate ligands and usually act as chelating ligands to metal cations (Afkhami et al, 2016), but in some cases they behave as monodentate ligands through the pyridine group alone
The hydrazone-based ligand in the title compound was prepared according to a method reported in the literature (Deng et al, 2005)

Summary

Chemical context

Hydrazone ligands based on pyridine are among the most important classes of flexible and versatile polydentate ligands and usually act as chelating ligands to metal cations (Afkhami et al, 2016), but in some cases they behave as monodentate ligands through the pyridine group alone. The hydrazone-based ligand in the title compound was prepared according to a method reported in the literature (Deng et al, 2005). The crystal structure of the ligand and three of its ZnII metal complexes have been reported previously (Mahmoudi et al, 2016). The title compound is the first reported crystal structure of a CdII complex of the ligand

Structural commentary

Supramolecular features

Synthesis and crystallization

Refinement