Fig. 3: Unification of multiple small-molecule activation reactions.

a ∆G(z) − ∆Gopt(z) as positive functions of the primitive descriptor ϕxx for X-X sites, where z represents *OH, *COOH, or *N2 → *N2H. Insets: ϕopt for different reactions and products. b Linear relationship between the bond energies of reactants (N≡N, C=O, and O=O bond) vs. ϕopt for corresponding reactions.