B3LYP-D3 and PBE0-D3 have 20% and 25% HF exchange, respectively. However, the M06 functional is an exception to this trend. It has 27% HF exchange but its ∆E S 0 -T 0 lies between PBE0-D3 and B3LYP-D3 values. This is another example what many readers already know: choosing a functional is rarely as simple as selecting the percent HF exchange. Despite good numerical agreement with WFT for both corrole complexes, the TPSSh-D3 ground state singlet is the closed shell state and not the correct multiconfigurational singlet ground state.