C60 reacts with 1 equivalent of pentacene to give a C60-pentacene monoadduct in 59% yield. lH and 13C NMR data confirm a C2V symmetric structure for the monoadduct consistent with C60 cycloaddition across central carbon atoms 6 and 13 of pentacene. Seven bispentacene adducts are formed in 13% overall yield.
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Mack et al. (1997) studied this question.
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