Fullerene cations pentaarylated

There are limited number of reports of the observation and isolation of functionalized fullerene cations. The monoalkylated [RC6o+(73,74), C12CH-C70+ (75), and (EtO)2P+(OH)CH2-C60+ (76)], monoprotonated [HC60+ (7-2,77)], and pentaarylated [Ar5C60+ (75)] fullerene cations have thus far been prepared as stable solutions or isolated as solids (Figure 1). 

Birkett and co-workers506 have applied a different approach using chloride abstraction with A1C13 from Ar5C6oCl to generate pentaarylated fullerene cations... 

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