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首页> 外文期刊>Journal of Solution Chemistry >Solvent effect on the enthalpy of solution and partial molar volume of the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate
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Solvent effect on the enthalpy of solution and partial molar volume of the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate

机译：溶剂对离子液体四氟硼酸1-丁基-3-甲基咪唑鎓溶液的焓和部分摩尔体积的影响

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摘要

Enthalpies of solution and partial molar volumes of the ionic liquid 1-butyl-3- methylimidazolium tetrafluoroborate were determined in 15 solvents of different polarity. Very large differences of the enthalpies of solution (Δ ΔsolHIL = 38.9 kJ·mol ~(-1)) and partial molar volumes (ΔVIL = 43 cm ~3·mol ~(-1)) are nearly the same as observed for lithium perchlorate solutions. These results clearly indicate that the low values of the macroscopic polarity parameters of [bmim]BF -4 do not correspond with the large differences of the intermolecular interactions in IL solutions. The values of the partial molar volume of the cation, V -([bmim]+), were estimated for the first time. The changes of the partial molar volumes, V -(IL), reflect mainly the changes of anion volume, V -(BF4). The rate of the Diels-Alder reaction of 9,10- dimethylanthracene with maleic anhydride in the [bmim]BF -4 medium was nearly the same as in common molecular solvents.
机译：在15种不同极性的溶剂中测定离子液体1-丁基-3-甲基咪唑鎓四氟硼酸盐的溶液焓和部分摩尔体积。溶液焓（ΔΔsolHIL= 38.9 kJ·mol〜（-1））和部分摩尔体积（ΔVIL= 43 cm〜3·mol〜（-1））的差异非常大，与高氯酸锂几乎相同。解决方案。这些结果清楚地表明，[bmim] BF -4的宏观极性参数的低值与IL溶液中分子间相互作用的大差异不符。首次估算了阳离子的部分摩尔体积的值V-（[bmim] +）。部分摩尔体积V-（IL）的变化主要反映出阴离子体积V-（BF4）的变化。在[bmim] BF -4介质中9,10-二甲基蒽与马来酸酐的狄尔斯-阿尔德反应速率与普通分子溶剂几乎相同。

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