Chemistry of eta(5)-fullerene metal complexes

Treatment of [60]fullerene with an organocopper reagent converts one of the pen tagons of the fullerene into cyclopentadienyl anion through addition o f five organic groups on every peripheral carbon atom surrounding the penta gon. Similar treatment of [70]fullerene afforded indenyl anion through regi oselective tri-addition of the organic group. These anionic moieties strong ly interact with the remainder of the fullerene pi -system, and provide uni que opportunity for exploration of organometallic chemistry of a new class of metal cyclopentadienides.