Excess molar enthalpies for [emim][BF<sub>4sub>] + pyrrolidin-2-one or 1-methyl pyrrolidin-2-one + pyridine or water mixtures

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• 作者：V.K. Sharma ; S. Bhagour ; S. Solanki ; Sheetal ; S.K. Jangra
• 关键词：1-Ethyl-3-methylimidazolium tetrafluoroborate ; Excess molar enthalpy ; HE ; Connectivity parameter of third degree ; 3尉 ; Interaction energy parameter ; 蠂
• 刊名：Journal of Chemical Thermodynamics
• 出版年：January, 2014
• 年：2014
• 卷：68
• 期：Complete
• 页码：235-243
• 全文大小：770 K

文摘

Excess molar enthalpies, of ternary 1-ethyl-3-methylimidazolium tetrafluoroborate (i) + Pyrrolidin-2-one (j) + Pyridine or Water (k); 1-ethyl-3-methylimidazolium tetrafluoroborate (i) 1-methyl pyrrolidin-2-one (j) + Pyridine or Water (k) and H<sup>Esup> of Pyrrolidin-2-one (i) + Pyridine or Water (j); 1-methyl pyrrolidin-2-one (i) + Pyridine (j); 1-ethyl-3-methylimidazolium tetrafluoroborate (i) + Water (j) mixtures have been measured over entire mole fraction range at 298.15 K. The value for 1-ethyl-3-methylimidazolium tetrafluoroborate (i) + Pyrrolidin-2-one (j) + Water (k); 1-ethyl-3-methylimidazolium tetrafluoroborate (i) + 1-methyl pyrrolidin-2-one (j) + Pyridine or Water (k) are positive over whole range of composition and for 1-ethyl-3-methylimidazolium tetrafluoroborate (i) + Pyrrolidin-2-one (j) + Pyridine (k) mixture, the sign of values varies with change in composition of the components. The observed data have been analyzed in terms of (i) Graph; and (ii) Prigogine-Flory-Patterson (PFP) theories. Results indicate that H<sup>Esup> and values obtained by Graph theory are in good agreement with experimental data. The PFP theory correctly predict sign as well as magnitude of H<sup>Esup> values for the binary mixtures. However, theory fails to predict the sign of values for the ternary mixtures.