The reactivity of the Mn nitrenoids that are invoked as transient intermediates in nitrene transfer catalysis renders these species challenging to observe. Stabilization of these intermediates via synthetic modification of the ancillary ligand set can attenuate the reactivity of the supported Mn nitrenoid and enable isolation. Abu-Omar and co-workers leveraged triply anionic corrole ligands to stabilize and isolate Mn(V) nitrenoid 1, which was prepared by photolysis of a solution of mesityl azide and Mn(III) tris-pentafluorophenylcorrole (Figure ). N