The evaporation study of silicon-containing ionic liquid

1,2-Dimethyl-3-(1′,1′,3′,3′-tetramethyl-3′-phenyldisiloxanyl)methylimidazolium bis(trifluoromethanesulfonyl)amide ([PhC5OSi2MMIm+][Tf2N−]) is the first silicon-containing ionic liquid which was characterized with the vaporization enthalpy, (138.5±1.8)kJmol−1, and saturated vapor pressure, ln(p/Pa)=−(16656±219)/(T/K)+(30.69±0.92). This compound is a unique ionic liquid giving ions, retaining both cationic and anionic portions, in the electron impact ionization (EI) mass spectrum.