Fig. 5: Mechanism investigation.
From: C(alkyl)–C(vinyl) bond cleavage enabled by Retro-Pallada-Diels-Alder reaction

a Proposed Mechanism (ligands are omitted for clarity). b DFT calculated relative Gibbs free energy profiles for the paths I, II and III by B3LYP-D3(dichloroethane)/{6-311 + +G(d,p), SDD(Pd)} with respective to Im1. c Activation barrier of retro-Pd-DA step. d Activation barrier of the overall path.