(2,2'-Bi-pyridine-κ(2) N,N')bis-(nitrato-κ(2) O,O')copper(II)

Area of Science:

• Coordination Chemistry
• Crystal Engineering
• Supramolecular Chemistry

Background:

• Copper(II) complexes are vital in catalysis and materials science.
• 2,2'-bipyridine is a common chelating ligand in coordination chemistry.
• Understanding supramolecular assembly is key to designing functional materials.

Purpose of the Study:

• To synthesize and characterize a novel copper(II) complex.
• To investigate the crystal structure and intermolecular interactions.
• To explore the supramolecular architecture of the [Cu(NO3)2(C10H8N2)] complex.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
• Analysis of bond lengths, angles, and intermolecular contacts was performed.
• The dihedral angle between pyridine rings and π-π stacking interactions were quantified.

Main Results:

• The copper(II) cation adopts a distorted N2O4 octahedral geometry, chelated by two nitrate anions and one 2,2'-bipyridine ligand.
• A small dihedral angle of 1.92° between the pyridine rings indicates near planarity.
• π-π stacking (3.6788 Å centroid-centroid distance) and weak C-H⋯O hydrogen bonds facilitate the formation of a 3D supramolecular network.

Conclusions:

• The synthesized copper(II) complex displays a unique coordination environment and intermolecular interactions.
• The study elucidates the self-assembly mechanism driven by π-π stacking and hydrogen bonding.
• The findings contribute to the understanding of crystal engineering principles for metal-organic frameworks.