Abstract
Organic Chemistry Iridium and nickel are already a proven team for forging carbon-carbon bonds. The iridium harvests blue light from a simple light-emitting diode and orchestrates the coupling by the nickel. Shaw et al. now add a third player to the team, a hydrogen atom transfer (HAT) catalyst (see the Perspective by Fruit). Together, the trio of catalysts can link bromo- or chloroaryl rings directly to C-H sites adjacent to nitrogen or oxygen, with no need for prior modification. The reaction is highly selective across a broad range of substrates. Science , this issue p. [1304][1]; see also p. [1277][2] [1]: /lookup/doi/10.1126/science.aaf6635 [2]: /lookup/doi/10.1126/science.aaf8923
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