Abstract
The ligand effect on CuI disproportionation is investigated through operando IR. It is found that the CuI complexes formed from the reaction of CuI with β-diketone enolate, β-keto ester enolate, and β-keto amide enolate could disproportionate to CuII and Cu0 species, respectively. The distinct disproportionation rates of CuI complexes chelated by different β-dicarbonyl ligands provide a useful insight into the nature of copper catalytic reactions, which will be helpful for designing ligands and understanding the mechanism of Cu-catalyzed coupling reactions.
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