Due to the unfavoured bond angles (60°), cyclopropyl groups are highly strained. Two orbital models were proposed to describe the bonding situation. The Coulson-Moffit model uses bent bonds. The C-C ...

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Now, a redox-state-tuned copper catalytic method is reported, which enables the enantioconvergent cross-coupling of cyclopropyl radicals and terminal alkynes with high chemo- and stereoselectivity.