Fig. 6: Proposal catalytic cycle for ATH of 1g with HCOOH.
From: Stereodivergent synthesis of chiral succinimides via Rh-catalyzed asymmetric transfer hydrogenation

The C=C reduction pathway was depicted in the left catalytic cycle and the C=O reduction pathway was described in the catalytic cycle on the right. The Gibbs free energy of the compounds, intermediates and transition states are provided below the corresponding chemical structures and the energies are given in kcal/mol.