The Existence of Stable Tm@C₈₂ Isomers

Abstract

Endohedral fullerene compounds with isomeric carbon frameworks have been identified for the first time. The three stable isomers of Tm2+@C were separated by HPLC, and characterized by cyclic voltammetry and by UV/Vis/NIR and 13C NMR spectroscopy as probably having C2, Cs, and C3v symmetry (see picture).