Generation and Properties of an Alkylated C_(70) Cation

摘要

Despite the widely accepted notion that fullerenes are electronegative molecules,recent studies of functionalized C_(60) cations have led to the successful generation of mono-alkylated (RC_(60))~+ (R = CHC1_2,CC1_2CH_2C1,CH_2P(O)(OEt)_2),protonated (HCM)~+,and pentaarylated (Ar_5C_(60))~+ (Ar = C_6H_5,4-FC_6H_4) derivatives.The fact that C_(70) is slightly more susceptible to electrochemical oxidation than C_(60) led us to expect that a monoalkylated C_(70) cation (RC_(70))~+ could also be generated as a long-lived cation and that its stability would be comparable to (RC_(60))~+.