Terminal dysprosium and holmium organoimides

Area of Science:

• Organometallic Chemistry
• Rare-Earth Chemistry
• Synthetic Chemistry

Background:

• Rare-earth metal imide complexes are valuable in catalysis and materials science.
• Synthesis of these complexes often involves challenging elimination reactions.

Purpose of the Study:

• To synthesize novel terminal rare-earth metal imide complexes.
• To investigate the reactivity of these complexes with carbon dioxide.

Main Methods:

• Synthesis via double methane elimination from Lewis acid stabilized dialkyl precursors.
• Reaction with aniline derivatives and Lewis bases like N,N-dimethyl-4-aminopyridine (DMAP).
• Treatment with 9-borabicyclo[3.3.1]nonane (9-BBN) for donor exchange.

Main Results:

• Successfully synthesized terminal imide complexes of dysprosium and holmium.
• Observed the formation of mixed methyl/anilido species and Lewis acid bridged imides.
• Demonstrated CO2 insertion into the imide complexes to form carbamate complexes.

Conclusions:

• Developed a new synthetic route to rare-earth metal imide complexes.
• Highlighted the versatile reactivity of these complexes, including CO2 insertion.
• Opened avenues for further exploration in rare-earth organometallic chemistry.