Reactivity of Cu(I) Nacnac Complexes Toward Polypnictogen Compounds

Area of Science:

• Organometallic Chemistry
• Coordination Chemistry
• Main Group Element Chemistry

Background:

• Aromatic cyclo-element ligands (E = P, As; n = 3-5) are of interest in inorganic chemistry.
• Coordination of group 11 metals to these ligands is challenging and underexplored.

Purpose of the Study:

• To synthesize and characterize novel heterometallic complexes involving copper and aromatic cyclo-E ligands.
• To explore the coordination behavior of a copper(I) compound with various cyclo-E ligands.
• To investigate the structural, dynamic, and electronic properties of the resulting complexes.

Main Methods:

• Reaction of a nacnac Cu(I) compound with complexes containing aromatic cyclo-E5, cyclo-P4, and cyclo-E3 ligands.
• Comprehensive characterization using crystallographic and spectroscopic methods (e.g., NMR).
• Variable-temperature (VT) NMR spectroscopy to study dynamic behavior.
• Density Functional Theory (DFT) calculations for electronic structure elucidation.

Main Results:

• Successful synthesis of several novel heterometallic complexes, including [(Cp*Fe)(μ,η5:2-E5)(LCu)] and [(Cp‴Co)(μ,η4:2-P4)(LCu)].
• Demonstration of rare coordination of a group 11 metal (copper) to aromatic cyclo-E ligands (E = P, As; n = 3-5).
• Detailed structural and spectroscopic data confirming the formation of the target complexes.
• Insights into the solution dynamics and electronic properties of these unique compounds.

Conclusions:

• The study presents rare examples of copper coordination to aromatic cyclo-E ligands, expanding the known coordination chemistry of these systems.
• The synthesized heterometallic complexes exhibit interesting structural and dynamic properties.
• DFT calculations provide a deeper understanding of the electronic structures of these novel compounds.