NDLI: Thermodynamics of cesium complexes formation with 18-crown-6 in ionic liquids

Content Provider	Springer Nature Link
Author	Vendilo, A. G. Rönkkömäki, H. Hannu Kuure, M. Lajunen, M. Asikkala, J. Krasovsky, V. G. Chernikova, E. A. Oksman, P. Lajunen, L. H. J. Tuomi, T. Popov, K. I.
Copyright Year	2009
Abstract	Thermodynamic data for cesium complexes formation with 18-crown-6 (18C6, L) [Cs(18C6)]$^{+}$ in N-butyl-4-methyl-pyridinium tetrafluoroborate ([BMPy][BF$_{4}$], I), in 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF$_{4}$], II) and in 1-butyl-3-methylimidazolium dicyanamide ([BMIM][N(CN)$_{2}$], III) were measured with NMR $^{133}$Cs technique at 23–50 °C. The stability of cesium complex in RTILs is estimated to be in the range between water and DMFA. Stability constants for [Cs(18C6)]$^{+}$ are found to decrease as temperature is increasing. The following values for lgK(Cs+L) and ΔH(Cs+L) at 23 °C are determined: 2.6 (0.3), −47(1) kJ/mol (RTIL I); 2.8(0.3), −80(3) kJ/mol (RTIL II) and 3.03 (0.08), −47(2) kJ/mol (RTIL III). It is demonstrated that enthalpy change promotes complex formation while the corresponding change of entropy is negative and provides decomposition of [Cs(18C6)]$^{+}$.
Starting Page	223
Ending Page	230
Page Count	8
File Format	PDF
ISSN	09230750
Journal	Journal of Inclusion Phenomena and Macrocyclic Chemistry
Volume Number	66
Issue Number	3-4
e-ISSN	15731111
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-06-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	RTIL Stability constants Complexes Cesium 18-crown-6 $^{133}$Cs NMR Crystallography Food Science Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics Food Science

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