Nucleophilic substitution of alkylchlorodihydro[60]fullerenes: thermodynamic stabilities of alkylated C60 cation intermediates.

Thermodynamic stabilities of alkylated C60 cations (RC60+) were determined based on the activation free energies of SN1 solvolysis of the title compounds, indicating that these cations have stabilities comparable to that of the tert-butyl cation.