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Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

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Competitive gold/nickel transmetalation.

Mitchell J Demchuk¹, Joseph A Zurakowski¹, Brady J H Austen¹

¹Department of Chemistry and Biochemistry, The University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada. marcus.drover@uwindsor.ca.

Chemical Communications (Cambridge, England)

|December 7, 2021

Summary

This summary is machine-generated.

Nickel-catalyzed reactions with gold compounds show both aryl-for-iodide and aryl-for-aryl transmetalation. This aryl scrambling can complicate catalytic cross-coupling reactions.

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Area of Science:

Organometallic Chemistry
Catalysis

Background:

Transmetalation is crucial for forming element-element bonds.
Nickel-phosphine complexes are widely used in cross-coupling reactions.

Purpose of the Study:

To investigate the reactivity of nickel(II) complexes with arylgold(I) transmetalating agents.
To understand the mechanisms of transmetalation in the context of cross-coupling catalysis.

Main Methods:

Reaction of [NiII(Ar)(I)(diphosphine)] with arylgold(I) compounds.
Analysis of reaction products to identify transmetalation pathways.

Main Results:

Observed both aryl-for-iodide and aryl-for-aryl transmetalation.
Demonstrated that aryl scrambling can occur even with a strong driving force for Au-I bond formation.

Conclusions:

Transmetalation with arylgold(I) agents can lead to complex outcomes in nickel catalysis.
Aryl scrambling presents a challenge for predictable catalytic cross-coupling.