Treatment of a 1,7-diorgano[60]fullerene with Grignard reagents or organocopper reagents affords a [60]fullerene indenide or a [60]fullerene cyclopentadienide regioselectively in good to excellent yields. These reactions gave an insight into the reaction mechanism of the organocopper penta-addition reaction of [60]fullerene, giving [60]fullerene cyclopentadienide in quantitative yield.
![Graphical abstract: Regioselective synthesis of [60]fullerene η5-indenide R3C60− and η5-cyclopentadienide R5C60− bearing different R groups](http://hg.y866.cn/compound/lib/scimg/usr/1/B302468G.jpg)
