Synthesis of 1,3-dialkyl imidazolium ionic liquids containing difunctional and tetrafunctional perfluoroalkylsulfonyl imide anions

Trifluoromethanesulfonamides and Related Compounds

“…Because the key characteristic of the anion in IL, responsible for its low-melting point, is delocalization of the negative charge decreasing the interionic interactions, asymmetric anions of the type [CF 3 SO 2 NCOCF 3 ] − should also provide the same effect as triflimide anion. Indeed, ILs with this and various unsymmetrical bis(perfluoroalkanesulfonyl)imides were synthesized and shown to have lowered both the melting points and viscosities. ,,,− …”

Synthesis and Characterization of a Novel Imidazolium Short‐Chain Fluorocarbon Surfactant as a Potential Agent for Aqueous Film Forming Foam

“…The temperature and the solvent were essential to adapt to different electron donors and 1‐positon substituted alkylimidazoles. No solvent was recommended for the conversion of 1‐methylimidazole to imidazolium without the need for complex purification [68,69] . Various conditions were tested to determine the optimal substitution of C 8 H 9 F 9 O 3 S with 1‐methylimidazole, as presented in Table 1.…”

Synthesis of guanidinium–sulfonimide ion pairs: towards novel ionic liquid crystals

“…However, the K + -sulfonimides 6a , b were not used for a direct methyl transfer towards the synthesis of the desired guanidinium–sulfonimide ion pairs in a similar way that the arylsulfonic acid methylesters were previously used as methyl transfer reagents [38], because we wanted to avoid the activation with dimethyl sulfate reported by DesMarteau [21]. Therefore we planned an indirect formation of the ion pairs by anion exchange via salt metathesis.…”

“…By using an elongated perfluoroalkyl chain at the bistriflimide anion in combination with short chain-substituted pyrrolidinium cations MacFarlane was able to induce plastic crystal phases and liquid-crystalline phases at room temperature [20]. Ion pairs consisting of perfluorosulfonylimide anions and imidazolium cations with short alkyl chains were studied by DesMarteau resulting in room-temperature ionic liquids [21]. In contrast, ILCs with bistriflimide anions are much less explored, because the sterically demanding anion often inhibits the formation of a mesophase [6,22].…”