C60 and C70 exhibit the capacity to be reversibly reduced with up
to six electrons.
This high electron affinity results from the
presence of triply-degenerate low-lying LUMOs (lowest
unoccupied molecular orbital). Oxidation of the molecule has
also been observed; nevertheless, oxidation is irreversible. C60
has a localized pi-electron system, which prevents the
molecule from displaying superaromaticity properties