Alkali metal trifluoroacetates for the nucleophilic trifluoromethylation of fullerenes

Difluoromethylenation of fullerene C70 provides isomeric diversity and availability of equatorial [5,6]-homofullerene C70(CF2)

“…45,46 Although there is no direct verification of attachment of CF 2 Cl À to fullerenes, of note is formation of C 60 CF 3 À anions under refluxing C 60 with CF 3 COOCs. 47 Thus, the body of available evidence is mostly in favor of the nucleophilic pathway in the reaction of C 60 and C 70 fullerenes with alkali metal chlorodifluoroacetates.…”

Para‐C60(CF2)(CF3)R: a family of chiral electron accepting compounds accessible through a facile one‐pot synthesis

“…It was recently shown [8] that short‐time refluxing of C 60 with CF 3 COOCs under inert atmosphere yields C 60 (CF 3 ) − anion identified by means of UV/Vis/NIR data as the main product ( o DCB/PhCN solution, 18‐crown‐6 as a phase transfer catalyst, ca 180 °C, 6 min). The air‐stable product, 1,9‐C 60 (CF 3 )H, was isolated from the reaction mixture after its acidic treatment with 52 % yield and characterized.…”

Reactivity of bi- and monometallic trifluoroacetates towards amorphous SiO2

“…This observation prompted us to investigate the reactivity of alkali trifluoroacetates KH(tfa) 2 and CsH(tfa) 2 towards a-SiO 2 . We were motivated by the fact that, although alkali trifluoroacetates have been used as trifluoromethylating agents, [6][7][8][9][10] they have not been considered as reagents for the solid-state synthesis of fluorosilicates. Fluorosilicates M 2 SiF 6 (M = Li-Cs) and M′ 3 SiF 7 (M′ = K-Cs) are extensively used as hosts for Mn 4+ downconverting red phosphors.…”