Gros, Paolesse, Gross and others have been instrumental in exploration of the chemistry of corroles. With a core similar to vitamin B12 (a corrin, or decahydrocorrole), the corrole system is particularly interesting for the formation of first-row transition metal complexes with a constrained coordination environment as compared to porphyrin. A full database is available at to investigate structure-function relationships in the photophysical and reactivity of these systems. These insights are especially interesting now that corroles are being included into heme-vacated enzyme pockets -designing protein-induced conformational change is an important contemporary research area. Corroles are possible to analyze through PorphyStruct (see comment above)-larger constructs, such as the biscorrole (VATTOC), can be analyzed by the SCSD method -showing a Ci conformation of the global π system resulting from core proton repulsion.