(super3)He NMR of He@C(sub60)(super6-) and He@C(sub70)(super6-). New records for the most shielded and the most deshielded (super3)He inside a fullerene

Corannulene has served as an efficient electron carrier between lithium metal and solid fullerenes, in the reduction of (super3)He@C(sub60) and (super3)He@C(sub70) by lithium metal, giving solutions of the corresponding hexaanions in THF-d(sub8). The (super3)He within the C(sub60) hexaanion was more strongly shielded than previous reports, and results are in complete accord with earlier predictions of the dramatic alteration of the magnetic properties of C(sub60) and C(sub70), by reduction of fullerenes to their hexaanions.