title: Rapid and accurate estimation of densities of room-temperature ionic liquids and salts.
abstract: Volume parameters for room-temperature ionic liquids (RTILs) and salts were developed. For 59 of the most common imidazolium, pyridinium, pyrrolidinium, tetralkylammonium, and phosphonium-based RTILs, the mean absolute deviation (MAD) of the densities is 0.007 g cm-3; for 35 imidazolium-based room-temperature salts, the MAD is 0.020 g cm-3; and for 150 energetic salts, the MAD is 0.035 g cm-3. The experimental density (Y) for an alkylated imidazolium or pyridinium-based room-temperature ionic liquid is approximately proportional to its calculated density (X) in the solid state: Y = 0.948X - 0.110 (correlation coefficient: R2 = 0.998, for BF4-, PF6-, NTf2- -containing ionic liquids); Y = 0.934X - 0.070 (correlation coefficient: R2 = 0.999, for OTf-, CF3CO2-, N(CN)2- -containing ionic liquids).
authors.affiliation: Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343, USA.
authors.forename: Chengfeng
authors.initials: C
authors.lastname: Ye
authors.forename: Jean'ne M
authors.initials: JM
authors.lastname: Shreeve
mesh_terms: D052578:Ionic Liquids / Q000737:chemistry*; D015394:Molecular Structure; D012492:Salts / Q000737:chemistry; D013237:Stereoisomerism; D013696:Temperature
chemical_list: D052578:Ionic Liquids; D012492:Salts