The novel C60 cycloadduct 1 is formed in the reaction of 8-methoxyheptafulvene with buckminster-fullerene C60. Compound 1 can be reduced to its tetraanion in four reversible steps; the spectral properties of the radical anion, dianion, and trianion were examined by UV/VIS/NIR spectroelectro-chemistry. Adduct 1 may lead to other functional-ized fullerenes having substructures with electron-transfer properties.
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Beer et al. (1994) studied this question.