Radical character of non-IPR isomer 28324 of C80 fullerene

The molecular structure of the 28324 isomer (C1) of C80 fullerene was analyzed based on the concept of substructures in fullerene molecules and with allowance for results of relevant quantum chemical calculations. The distribution of single, double, and delocalized π-bonds is presented for the first time. It is shown that the instability of the fullerene studied is due to its open-shell structure and high local strain. It was found that positions of endohedral metal atoms inside the fullerene cage are in the region of the radical cluster discovered.