ChemInform Abstract: Cross-Fullerene Dimers [(C60)(C70)]: Solid-State Synthesis, Characterization and Mechanism.

Two isomers of the cross-fullerene dimer, i.e., [(C 6 0 )(C 7 0 )], were synthesized in the solid state, isolated by recycling high performance liquid chromatography and characterized by mass spectrometry and UV/Vis absorption spectroscopy. The observed inability to produce a similarly dimerized endohedral metallofullerene, (La@C 8 2 ) 2 , strongly suggests the dimerization mechanism of a nucleophilic addition from the additive material to the carbon cage and at the final step of an intramolecular S N 2' reaction that connects the two fullerene cages.