Aromatic character of typical C60 derivatives

The topological resonance energy (TRE) method has revealed that typical derivatives of C60 are moderately aromatic like the parent molecule C60. For most C60 derivatives, polyvalent molecular anions are at least as aromatic as the neutral species, whereas polyvalent molecular cations are much less aromatic in nature. In general, addition and insertion reactions with C60 proceed in such a manner that the reaction products become as aromatic as possible.