A robust bis-rhodium(i) complex of π-extended planar, anti-aromatic hexaphyrin[1.0.1.0.1.0]

Abstract

β,β′-Phenylene bridged hexaphyrin[1.0.1.0.1.0] (naphthorosarin), an expanded porphyrin possessing C_3v-symmetry, has been shown to possess unique electronic features. We now report a bimetallic Rh(I)-complex of naphthorosarin retaining 24 π-antiaromatic characteristics. The two Rh(I) cations reside on opposite sides of the macrocyclic π-system and are separated at a distance consistent with a possible Rh(I)–Rh(I) metallic bond interaction.