Revisit to the reaction of [60]fullerene with nitrile ylides generated from imidoyl chlorides and triethylamine

The reaction of [60]fullerene (C60) with nitrile ylides generated from N-benzyl-4-nitrobenzimidoyl chloride/N-(4-chlorobenzyl)-4-nitrobenzimidoyl chloride and triethylamine gave only isomeric monoadducts of C60 with [6,6]-closed structure. No [5,6]-open adduct of C60 could be identified from these reactions. The previously reported [5,6]-open product of C60 should be reassigned as a [6,6]-closed product.