Nitrogen Directs Multiple Radical Additions to the 9,9'-Bi-1-aza(C_(60)-I_h)[5,6]fullerene: X-ray Structure of 6,9,12,15,18-C_(59)N(CF3)5

摘要

Azafullerenes, in which a cage carbon atom is replaced by a nitrogen atom, are the only type of heterofullerenes that can be made in practical amounts, and this makes it possible to probe the effects of cage-atom substitution on the physical and chemical properties. Herein, we report a unique type of isomerism in azafullerenes bearing trifluoromethyl groups, which is attributed to the directing role of the nitrogen atom, and the first X-ray structure of the C_(59)N derivative prepared directly from (C_(59)N)2.