Fig. 4: Catalytic cycle for EDA complex formation and radical generation.

Gibbs energies (in kcal mol⁻¹), computed via DFT calculations at 298.15 K and 1 atm in DMSO, are given in parentheses (Supplementary Section 6.2). Reduction of the DABCO cationic radical is explored further in Fig. 5. R, methylcyclohexyl; SET, single-electron transfer; BET, back electron transfer.