Fig. 7: Racemization experiments.

Barriers to racemization of (A) helical chirality and (B) axial chirality. ^aExperimental relative Gibbs free energy (kcal/mol). ^bRelative Gibbs free energies were calculated at the SMD(Toluene)/M06-2X-D3/def2-TZVPP//B3LYP D3(BJ)/def −2-SVP level of theory.