[Cu(C8H16N4O2)0.5[N(CN)2]]n, a novel ladder-like coordination polymer

Area of Science:

• Coordination Chemistry
• Materials Science
• Crystallography

Background:

• Polymeric metal complexes offer tunable properties for advanced applications.
• Copper complexes are of interest due to their diverse oxidation states and catalytic activities.
• The synthesis of novel network structures provides insights into supramolecular chemistry.

Purpose of the Study:

• To synthesize and characterize a new polymeric copper complex.
• To investigate the structural features and network assembly of the synthesized complex.
• To explore the potential of dicyanamide ligands in constructing coordination polymers.

Main Methods:

• Chemical synthesis involving copper(II) salts and organic ligands.
• Single-crystal X-ray diffraction for structural determination.
• Infrared spectroscopy for ligand and complex characterization.

Main Results:

• A novel polymeric copper complex, catena-poly[[[mu-N,N -bis(3-aminopropyl)oxamidato-kappa6N,N ,O:N",N",O ]dicopper(II)]-di-mu-dicyanamido-1:1'kappa2N1:N5;2:2'kappa2N1:N5], [Cu2(C8H16N4O2)(C2N3)2]n, was successfully synthesized.
• The crystal structure revealed five-coordinate copper(II) atoms with a square-pyramidal configuration.
• Dicyanamide ligands bridge dicopper(II) units, forming polymeric ladders that assemble into a 2D network via hydrogen bonding.

Conclusions:

• The study presents a new coordination polymer with an unprecedented ladder architecture.
• The self-assembly into a 2D network highlights the role of hydrogen bonding in supramolecular construction.
• This work expands the library of copper-based coordination polymers with potential applications in materials science.