Importance of macrocyclic ring deformation in the facile aerial oxidation of phenolic porphyrins
Abstract
Unlike its metal-free precursor and NiII analogue, meso-tetrakis(3,5-di-t-butyl-4-hydroxyphenyl)- porphyrinatopalladium(II) undergoes very little aerial oxidation in basified dichloromethane, owing to metal-enforced planarity of the porphyrin macrocycle, as shown by crystal structure determinations of the two complexes.