Finally, an active space that includes the full corrole π system was used, the restricted active space denoted (36e,2h,2e; 16o,5o,13o) (vide supra) or simply RASSCF(36e,34o). The RASSCF(36e,34o) results qualitatively supports those obtained with the (14e,15o) complete active space, both in terms of the energy splitting between the low-lying states (Table and S6) and in the nature of the wavefunction (Table ). The closed-shell HF determinant, (π a 2 ) 2 (π b 1 ) 2 (d x 2 -y 2 ) 0 , contributes the most, as was the case for the larger complete active space, albeit with a smaller value of 40.0% in the unfunctionalized corrole and 42.9% in the triphenyl system. The other two configurations reported change contributions to a smaller extent. This suggests that including the remaining π orbitals in the active space is important despite the fact that configurations with single occupations of these orbitals do not contribute to the total wavefunction larger than 1%.