Platinum has been inserted into corroles for the first time and three oxidized Pt^IV(corrole˙²⁻)ArAr′ complexes have been structurally characterized. The Soret maxima of these complexes exhibit an unusually strong dependence on the meso-aryl substituents on the corrole, indicating aryl → corrole˙²⁻ charge transfer character in these transitions.

Multiple lines of evidence, including electronic absorption spectroscopy, infrared spectroscopy, and broken-symmetry DFT calculations, indicate that the well-known FeNO corroles, long assumed to be {FeNO} ⁶ complexes, are in fact better described as {FeNO} ⁷ -(corrole˙ ²⁻ ).