Bis(3-hydroxy-pyridine-κN)bis-(3-nitro-benzoato-κO)zinc(II)

Area of Science:

• Coordination Chemistry
• Crystallography
• Supramolecular Chemistry

Background:

• Zinc complexes are vital in various chemical and biological processes.
• Understanding the structural and bonding characteristics of metal complexes is crucial for designing new materials.
• The specific ligands, 7-hydroxyquinoline-8-carboxylic acid and 2-hydroxypyridine, have unique coordination properties.

Purpose of the Study:

• To synthesize and characterize a novel zinc(II) complex.
• To elucidate the crystal structure and coordination geometry of the title complex.
• To investigate the intermolecular interactions governing the crystal packing.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
• The coordination environment around the central zinc ion was analyzed.
• Intermolecular interactions, such as hydrogen bonding and pi-pi stacking, were identified and quantified.

Main Results:

• The title complex, [Zn(C(7)H(4)NO(4))(2)(C(5)H(5)NO)(2)], was successfully synthesized and characterized.
• The zinc(II) ion adopts a distorted tetrahedral coordination geometry with ZnN(2)O(2) donors.
• Molecules are linked via intermolecular O-H⋯O hydrogen bonds and π-π stacking interactions between pyridine rings (centroid-centroid separation 3.594 Å).

Conclusions:

• The crystal structure reveals a unique distorted tetrahedral coordination for the zinc(II) ion.
• Intermolecular hydrogen bonding and π-π stacking play a significant role in the self-assembly of the crystal lattice.
• This structural insight contributes to the understanding of zinc coordination complexes and their supramolecular assembly.