The average dihedral angles Ω and χ are less than 1 • for the XMS-CASPT2 and DFT geometries in the unfunctionalized corrole, consistent with the assignment of a planar structure. However, the T 0 molecular geometry deviates from planar to a greater extent in the triphenyl functionalized corrole. In the DFT geometries, the average magnitudes of the Ω and χ are within 5.3-7.3 • and 14.3-18.7 • respectively.