A direct access to heterobimetallic complexes by roll-over cyclometallation

Area of Science:

• Organometallic Chemistry
• Coordination Chemistry
• Catalysis

Background:

• Cyclometallation is a key reaction in organometallic chemistry.
• Iridium complexes are widely studied for their catalytic and photophysical properties.
• Heterobimetallic complexes offer unique reactivity and properties due to the presence of multiple metal centers.

Purpose of the Study:

• To explore the cyclometallation of [Cp*Ir(N,N')Cl]+ complexes.
• To develop a strategy for synthesizing novel heterobimetallic complexes.
• To investigate the formation of new N,N'-donor sites in iridium complexes.

Main Methods:

• Synthesis of iridium(III) complexes with N,N'-donor ligands.
• Investigation of cyclometallation reactions under various conditions.
• Characterization of the resulting complexes using spectroscopic and analytical techniques.
• Assembly of heterobimetallic complexes with Group X metals.

Main Results:

• Successful roll-over cyclometallation of [Cp*Ir(N,N')Cl]+ complexes was achieved.
• A novel N,N'-donor site was generated through cyclometallation.
• Heterobimetallic complexes containing iridium(III) and a Group X metal (oxidation state +II) were successfully synthesized.
• The structural and electronic properties of the new complexes were investigated.

Conclusions:

• The developed strategy provides a facile route to novel heterobimetallic iridium complexes.
• The new N,N'-donor site offers opportunities for further functionalization and complexation.
• These findings expand the scope of organometallic synthesis and the design of multi-metallic systems.