The estimation of physico-chemical properties of ionic liquid N-propylpyridine rheniumate

Estimation of Physicochemical Properties of Ionic Liquids [H2N-C2mim][BF4] and [H2N-C3mim][BF4]

“…This indicates that a mean contribution per methylene (−CH 2 −) to the molecular volume is 0.0296 nm 3 . The value is in good agreement with that of methylene contributions of 0.0280 nm 3 from n -alcohols, 0.0272 nm 3 from n -amines, 0.0267 nm 3 from n -paraffins, and reported ionic liquids in the literature. − …”

“…The lattice energy, U POT , of the ionic liquids may be estimated in terms of Glasser's empirical equation: italicU POT / kJ · mol − 1 = 1981.2 false( normalρ / M false) 1 / 3 + 103.8 The values of lattice energy of [H 2 N-C 2 mim][BF 4 ] and [H 2 N-C 3 mim][BF 4 ] at 298.15 K are listed in Table . The lattice energy for the studied ionic liquids is close to those of ionic liquid series reported in the literature. − It is also shown that the lattice energy of the studied ionic liquids is much less than those of fused salts, for example, U POT is 613 kJ·mol −1 for fused CsI, which has the lowest lattice energy among all of the alkali halides . This fact shows that the interaction energy among ions in [H 2 N-C 2 mim][BF 4 ] and [H 2 N-C 3 mim][BF 4 ] is less than that in fused salts.…”

“…For this reason, the differences in the coefficient of thermal expansion are slight. The values are comparable to the coefficient of thermal expansion of the other ionic liquids. − It might be concluded that the thermal coefficient of imidazolium-based ionic liquids was slightly influenced by the functional group attached to the imidazolium ring.…”

“…However, the properties of these functionalized ionic liquids were not investigated in detail, which may restrict their application. To expand our knowledge of the ionic liquid chemistry, − we have synthesized ionic liquids with an amino functional group, namely, 1-(2-aminoethyl)-3-methylimidazolium tetrafluoroborate, [H 2 N-C 2 mim][BF 4 ], and 1-(3-aminopropyl)-3-methylimidazolium tetrafluoroborate, [H 2 N-C 3 mim][BF 4 ], and measured their density and surface tension in the temperature range of (293.15 to 343.15) K. The coefficient of thermal expansion, molecular volume, standard entropy, and lattice energy were calculated using experimental density data. Meanwhile, the surface entropy and enthalpy were calculated from surface tension data.…”

Spectroscopic and Thermal-Gravimetric Investigation of two New Rhenium (V) Ionic Liquid Complexes

“…3,4 Methyltrioxorhenium (MTO) is a very efficient catalyst precursor for a variety of organic reactions. [5][6][7][8][9][10] We now report the synthesis of the new ILs complexes, (2). The complexes were characterised using spectroscopy, thermogravimetry and micro analysis.…”