Poly[[[μ-trans-1,2-bis-(pyridin-4-yl)ethene-κ² N:N']-μ-iodido-copper(I)]-trans-1,2-bis-(pyridin-4-yl)ethene (1/0.25)]

Area of Science:

• Coordination Chemistry
• Materials Science
• Crystallography

Background:

• Copper iodide complexes are of interest for their diverse structural motifs and potential applications.
• The ligand 1,2-bis-(pyridin-4-yl)ethene (bpe) is a versatile building block in coordination chemistry.
• Understanding the self-assembly of metal-organic frameworks is crucial for designing new materials.

Purpose of the Study:

• To synthesize and characterize a new copper iodide complex with bpe ligands.
• To elucidate the crystal structure and supramolecular assembly of the title compound.
• To investigate the structural features of type 1 copper-halide complexes.

Main Methods:

• Synthesis of the title compound {[CuI(bpe)]·0.25(bpe)} from copper(I) iodide and bpe in acetonitrile.
• Single-crystal X-ray diffraction analysis to determine the molecular and crystal structure.
• Analysis of the coordination environment and structural motifs, including rhombic dimers and polymeric frameworks.

Main Results:

• The title compound was successfully synthesized and characterized, yielding red crystals.
• The crystal structure reveals rhombic dimers of Cu2I2 bridged by bpe ligands, forming oligomeric ribbons.
• These ribbons arrange into a two-dimensional honeycomb framework along the (01) plane, with disordered free bpe molecules occupying voids.

Conclusions:

• The study presents a new copper(I) iodide coordination polymer with a 2D honeycomb structure.
• The compound exemplifies a type 1 complex according to Graham nomenclature, featuring Cu2I2 rhombic dimers.
• The structural arrangement highlights the role of bpe ligands in directing the formation of extended networks.