Di aryl fullerene

Ar =PH, CjHjMe, CgHjOMe. C5H4CI, CgHjCOMe, 1-naphthyl, 1-pyrenyl Ai = Ph, etc. 

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Scheme 3.5 Synthesis of l,4-di(aryl)[60]fullerenes. (a) Starting from fullerene oxide, (b) Reaction with arylhydrazine. (c) Friedel-Crafts type reaction. (d) Rhodium-catalyzed monoarylation.

An efficient way to generate fullerene cationic species through the oxidation of a fullerene radical or a fullerene anion with a Cu(II) salt has been reported. The cationic fullerene is useful for functionalization of fullerene, and in particular, for the synthesis of noncyclic l,2-di(organo)[60]fullerene derivatives that can be selectively prepared through intramolecular [l,4]-aryl migration of an aryl group from a silicon atom to the fullerene core. 

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