Abstract

Molecular interactions prevailing in ionic liquid 1-methyl-3-octylimidazolium tetrafluoroborate ([OMIM]BF4) in
nitromethane, 1,3-dioxolane (DO) and dimethyl sulfoxide have been explored at 298.15 K. Investigations regarding
electrolytic conductivities (Λ), densities (
ρ ), viscosities (), refractive indices (nD) and speed of sound (u) of the
ionic liquid ([OMIM]BF4) have been performed in the solvents at 298.15 K. The deviation of the conductometric
curves (Λ vs. √c) linearity for the salt in DO indicates triple-ion formation, and conductance data have been
analyzed by using the Fuoss–Kraus theory of triple-ions. Limiting apparent molar volumes (fV
0 � ), experimental
slopes (SV
* ) derived from the masson equation, and viscosity A and B coefficients using the Jones–Dole equation
have been interpreted in terms of ion-ion and ion solvent interactions respectively. Molar refraction (RM ) has
been determined from Lorentz–Lorenz equation. Adiabatic compressibility (bS) has been evaluated using the u
values.