Other examples of the D3h symmetric 𝒮 3 ℬ 2 class include systems such as free-base triphyrin[2.2.2] monoanion (e.g., 28 less one inner H-atom). The analogous approximated PES for this can be found in the Supplementary Information. This expanded macrocycle admits larger atoms in place of the inner H-atoms and modulation of the corresponding PES (see Discussion).