Fig. 4: Mechanistic investigations and energy profile of the dual catalytic system.

Proposed dual catalytic reaction mechanisms for the C–C cross-coupling (a), Stern-Volmer quenching of 1 with Na2CO3 (b), quenching plots of different species (c), radical trap experiment (d), DFT-calculated energy profile for the decarboxylative C(sp3)–C(sp3) cross coupling reaction (e), and EPR evolution of the reaction (f). Brown, blue, light purple, pink, red, and white balls correspond to carbon, nickel, nitrogen, bromide, oxygen, and hydrogen atoms, respectively.