Isolation and Characterization of C60F38. Loss of Aromaticity on F2 Addition to C60F36

Infrared, Raman, and DFT Vibrational Spectroscopic Studies of C60F36 and C60F48

IR and Raman spectra of two fluorofullerenes, C60F48 and C60F36, are thoroughly studied. Assignment of the experimental spectra is provided on the basis of density functional theory (DFT) computations. Perfect correspondence between experimental and computed spectra enabled us to confirm that the major isomer of C60F48 has D3 symmetry. It was found that as-synthesized samples of C60F36 consist mainly of C3 and C1 isomers in ca. 2:1 ratio and 2-3% of T-symmetric structures. Extensive AM1 and DFT computations have shown that all three structures are the most stable isomers of C60F36. Previous structural assignment of the C3 isomer (Gakh, A. A.; Tuinman, A. A. Tetrahedron Lett. 2001, 42, 7137-7139) was confirmed by the vibrational data.

A Prospective Overview of the Potential of Fluorofullerenes as Host Materials for Intercalation Chemistry

A theoretical survey of the ability of fluorofullerene crystals to act as host lattices for intercalation chemistry is proposed on a thermochemical basis and from the assumption that complete charge transfer between the fluorocarbon network and an electropositive intercalant species should occur upon insertion. A nearly exhaustive examination is performed throughout the fluoro[60]fullerene family, describing the influence of the intercalated element considered, stoichiometry, structural type, and fluorine content on the potential stability of an intercalated phase. Decomposition of the latter into a metal fluoride is then discussed. When extended to a general scheme, emphasizing the role played by the number of carbon atoms in the initial cluster, the present model shows that stable fluorofulleride salts may be expected to form in some cases. A final insight into the solid state properties of this class of materials, combined with a widespread range of potential applications, is provided.