Benzyne addition to a metal-carbon multiple bond

Area of Science:

• Organometallic Chemistry
• Rhodium Complexes
• Carbyne Chemistry

Background:

• Rhodium-carbido complexes are known for their unique reactivity.
• Understanding the addition of unsaturated organic molecules to metal-carbido bonds is crucial for synthetic applications.

Purpose of the Study:

• To investigate the reaction of a linear rhodium-carbido complex with a benzyne equivalent.
• To characterize the resulting product and elucidate the reaction mechanism.

Main Methods:

• Synthesis of the linear μ-carbido complex [Rh2(μ-C)Cl2(dppm)2].
• Reaction with a benzyne equivalent (2-trimethylsilylphenyl triflate/fluoride).
• Characterization of the product using spectroscopic techniques.

Main Results:

• The rhodium-carbido complex reacted with the benzyne equivalent to form a new rhodium complex.
• The benzyne moiety was observed to add across one of the metal-carbon double bonds.
• The product was identified as [Rh2(μ-CC6H4)(μ-Cl)(C6H5)Cl2(μ-dppm)2].

Conclusions:

• The study demonstrates the successful addition of a benzyne moiety to a rhodium-carbido complex.
• This reaction provides a new route to functionalized rhodium complexes.
• The findings contribute to the understanding of metal-carbido complex reactivity.