Oxidation of Platina(II)corrole to Platina(IV)corrole

Recently, the aromaticity and antiaromaticity of organometallacycles have received much attention to understand the cyclic electronic delocalization through d orbitals on the metal center. Here, we prepared a Pd(II) platina(II)corrole bipyridyl complex, which was converted to the corresponding stable Pt(IV) complex upon oxidation with iodobenzene dichloride. Oxidation of the platinum center did not result in the C-C bond formation between two pyrrole units via reductive elimination. The X-ray diffraction analysis of these complexes elucidated their nonplanar molecular structures. The nonaromatic nature of platina(II)- and platina(IV)corroles was revealed by ¹H NMR analysis and NICS calculations.