Abstract

The electrical conductivity of a number of tetraalkylammonium ionic liquids with tetrafluoroborate anion has been studied in acetone in the temperature range 298–313 K. Based on the obtained conductometric data for the compounds under study, the Lee–Wheaton method has been used to calculate the ion association constants (K_a), limiting molar electrical conductivities (λ₀), and Gibbs association energy (ΔG⁰) in solutions. From the temperature dependence of equivalent electrical conductivity, the values of association enthalpy (ΔH⁰) and entropy (ΔS⁰) have been calculated. For all studied compounds, the Walden–Pisarzhevsky product has been calculated. Conclusions are drawn about the influence of the structure of the studied ionic liquids on the thermodynamic parameters of association in acetone solutions.

中文翻译：

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丙酮中铵离子液体离子缔合的电导率和热力学

摘要

研究了多种具有四氟硼酸根阴离子的四烷基铵离子液体在丙酮中在 298-313 K 温度范围内的电导率。根据所研究化合物获得的电导数据，使用 Lee-Wheaton 方法计算了溶液中的离子缔合常数 ( Ka ₎、极限摩尔电导率 (λ ₀ ) 和吉布斯缔合能 (Δ G ⁰ )。根据等效电导率的温度依赖性，计算出缔合焓(Δ H ⁰ )和熵(Δ S ⁰ )的值。对于所有研究的化合物，都计算了 Walden-Pisarzhevsky 乘积。得出了所研究的离子液体的结构对丙酮溶液中缔合热力学参数的影响的结论。