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Physicochemical Properties of Air and Water Stable Rhenium Ionic Liquids
Air and water stable ionic liquids (ILs) based on catalytic
functional
metal rhenium, [C<sub><i>n</i></sub>mim]Â[ReO<sub>4</sub>]Â(<i>n</i> = 2,4,5,6)Â(1-alkyl-3-methylimidazolium perrhenate),
are designed and synthesized. Their density and surface tension are
measured in the temperature range of 293.15–343.15 ± 0.05
K. Some physical-chemical properties of the ILs have been calculated
or estimated by the empirical methods. The ion parachor is put forward
and calculated by two extrathermodynamic assumptions. According to
the interstice model, the thermal expansion coefficient of ILs [C<sub><i>n</i></sub>mim]Â[ReO<sub>4</sub>], α, are calculated
and in comparison with experimental values, their magnitude order
is in good agreement