[C60(CN)5]–: A Remarkably Stable [60]Fullerene Anion

Abstract Reaction of C 60 Cl 6 with organic cyanide yielded an ionic salt comprising the fullerene anion [C 60 (CN) 5 ] – . This anion showed unprecedented stability in air and in solutions in the presence of water, organic and inorganic acids, and various electrophiles. The remarkable stability of the [C 60 (CN) 5 ] – anion opens wide opportunities for the design of various air‐stable salts incorporating different cations (metallocene, tetrathiafulvalene, and etc.) that might reveal valuable magnetic or electronic properties and find wide application in the field of material science.