Di organo fullerene

Bowl-shaped carbocations (33) were obtained by alkylation of the parent corannulene. ° The cations were obtained as stable salts and characterized by X-ray analysis. Phenalenyl cations (e.g. (34)) were obtained as air-stable BPh4 salts. Observations made in a selective synthesis of l,2-di(organo)fullerenes led to a mechanism whereby a cationic fullerene intermediate is generated by Cu(ll) oxidation of a fullerene radical (or anion). ... 

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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