It is now available commercially. Pure material is obtained as in the previous purification and elutes after C78 (D3 h)-fullerene. It consists of at least two isomers. The identities are confirmed by an HPLC/GPC system with Waters 600E UV/VIS detection, mass and NMR spectroscopy. [Seleque et al. In Kadish and Ruoff (Eds) Fullerenes: Recent Advances in the Chemistry and Physics of Fullerenes and Related Materials The Electrochemical Soc. Inc, Pennington, NJ, 1994 ISBN 1566770823, Diederich & Whetten Acc Chem Res 25 119 1992, Diederich et al. Science 254 1768 1991.]
