Bis-rhodium hexaphyrins: metalation of [28]hexaphyrin and a smooth Hückel aromatic–antiaromatic interconversion

Metalation of [28]hexaphyrin(1.1.1.1.1.1) with [RhCl(CO)(2)](2) resulted in the formation of an antiaromatic bis-Rh(i) complex, which can be oxidized to an a...