The enthalpies of solution of tetraethyl- and tetra-n-hexylammonium bromides have been measured in mixtures of formamide with ethylene glycol at 298.15 and 313.15 K in the whole mole fraction range by the calorimetric method. The standard enthalpies of solution in binary mixtures have been calculated with Redlich–Rosenfeld–Meyer type equation. The enthalpy and heat capacity parameters of pair interaction of organic electrolytes with EG in FA and with FA in EG have been computed and discussed. The enthalpy interaction parameters of single ions with EG in FA medium have been evaluated and compared with those for ion–water and ion–MeOH interaction in FA. The standard heat capacities of solution have been evaluated. The excess enthalpies of solution, ΔsolHE, of Et4NBr, Bu4NBr, and Hex4NBr have been determined. The ΔsolHE values are positive for Et4NBr and negative for Bu4NBr and Hex4NBr and become more negative from Bu4NBr to Hex4NBr.
1. C De Visser Somsen, G. Enthalpies of solution of tetra-n-butylammonium bromide in binary mixtures of water, formamide, N-methylformamide, and N,N-dimethylformamide. J Solut Chem. 1974;3:847–855 .
2. Kustov, AV, Smirnova, NL, Antonova, OA, Korolev, VP. Thermodynamic characteristics of solution and interparticle interactions in water–formamide–Et4NBr and methanol–formamide–Et4NBr systems. Russ J Phys Chem 2008 82:1549–1554 .
3. Korolev, VP, Smirnova, NL, Antonova, OA, Kustov, AV. Heat properties of Bu4NBr solutions in binary mixtures based on formamide. Russ J Gen Chem 2008 78:2013–2018 .
4. Korolev, VP, Antonova, OA, Smirnova, NL, Kustov, AV. Thermochemistry of Bu4NBr solutions in binary solvents containing formamide. J Therm Anal Calorim 2009 96:903–910 .
5. McMillan, WG, Mayer, JE. The statistical thermodynamics of multicomponent systems. J Chem Phys 1945 13:276–305 .
6. Desnoyers, JE, Perron, G, Avédikian, L, Morel, JP. Enthalpies of the urea-tert-butanol-water system at 25 °C. J Solut Chem 1976 5:631–644 .
7. Savage, JJ, Wood, RH. Enthalpy of dilution of aqueous mixtures of amides, sugars, urea, ethylene glycol, and pentaerythritol at 25 °C: enthalpy of interaction of the hydrocarbon, amide, and hydroxyl functional groups in dilute aqueous solutions. J Solut Chem 1976 5:733–750 .
8. Heuvelsland, WJM C de Visser Somsen, G. Enthalpic pair-interaction coefficients between electrolytes and non-electrolytes in water and N,N-dimethylformamide. J Chem Soc Faraday Trans 1. 1981;77:1191–1199 .
9. Belousov VP , Shutin SG. Kalorimetriya smesheniya (calorimetry of mixing). In: Krestov GA, editor. Eksperimental'nye metody khimii rastvorov (experimental methods of solution chemistry): spektroskopiya i kalorimetriya (spectroscopy and calorimetry). Moscow Nauka; 1995. pp. 287–339.
10. Korolev VP , Antonova OA, Smirnova NL, Kustov AV. Thermal properties of tetraalkylammonium bromides in several solvents. J Therm Anal Calorim. 2010. doi: .
11. Kustov, AV, Korolev, VP. Temperature and length scale dependence of tetraalkylammonium ion–amide interaction. J Phys Chem B 2008 112:2040–2044 .
12. Kustov, AV, Emel'yanov, AA, Syschenko, AF, Krest'yaninov, MA, Zheleznyak, NI, Korolev, VP. Calorimetric apparatus for measurement of thermal effects of processes in solutions. Russ J Phys Chem 2006 80:1532–1536 .
13. Chen, T, Hefter, G, Buchner, R, Senanayake, G. Molar volumes and heat capacities of electrolytes and ions in nonaqueous solvents: 1. Formamide. J Solut Chem 1998 27:1067–1095 .
14. Pitzer, KS Activity coefficient in electrolyte solutions 1991 2 CRC Press Boca Raton, FL.
15. Kustov, AV, Bekeneva, AV, Antonova, OA, Korolev, VP. Enthalpic pair–interaction coefficients of benzene, aniline and nitrobenzene with N,N-dimethylformamide and acetonitrile in water at 298.15 K. Thermochim Acta 2003 398:9–14 .
16. Fernández, J, García-Lisbona, MN, Lilley, TH, Linsdell, H. Enthalpy of interaction of some amides with ammonium methanoate in water at 25 °C. Interactions between ionic group and peptide and hydrophobic groups. J Chem Soc Faraday Trans 1997 93:407–411 .
17. Palecz, B. The enthalpies of interaction of glycine with some alkan-1-ols in aqueous solutions at 298.15 K. Fluid Phase Equilib. 1996;126:299–303 .
18. Korolev, VP, Kustov, AV. Temperature dependence of the pair interaction between hydrophobic and hydrophilic solutes: a calorimetric study. Thermochim Acta 2005 437:190–195 .
19. Krestov, GA, Korolev, VP, Vandyshev, VN. Enthalpies of solvation of ions and donor–acceptor ability of atom-molecular particles in solution. Dokl AN SSSR 1988 302:132–134.
20. Korolev, VP, Serebryakova, AL, Krestov, GA. Enthalpic characteristics of individual ions in mixed solvent acetonitrile–methanol at 298.15 K. Zh Obsch Khim 1991 61:2129–2135.
21. Kustov, AV, Manin, NG, Korolev, VP. Enthalpies of solution of tetraethyl- and tetrabutylammonium bromides in water–formamide system. Zh Fiz Khim 2003 77:2170–2174.
22. Manin, NG, Korolev, VP, Krestov, GA. Termokhimiya solvatatsii ionov v vodno-spirtovykh rastvoritelyakh pri 298.15 K (thermochemistry of solvation of ions in water–alcohol solvents at 298.15 K). Zh Khim Termodin Termokhim (J Chem Thermodyn Thermochem) RAS. Inst Non-aqueous Solut Chem 1992 1:27–54.
23. Korolev, VP. Parameters of the interaction between components; structural and hydrophobic effects in systems water–ethylene glycol–n-butyl alcohol and water–ethanol–xenon at 248–348 K. J Struct Chem. 2006;47:699–710 .
24. C De Visser Somsen, G Hydrophobic interactions in mixtures of N,N-dimethylformamide and water. Model calculations and enthalpies of solution. J Phys Chem 1974 78:1719–1722 .
25. Heuvelsland, WJM C de Visser 1979 Somsen, G, LoSurdo, A, Wen, W-Y. Hydrophobic hydration of some different types of quaternary ammonium bromides in mixtures of water and N,N-dimethylformamide. J Solut Chem 8:25–34 .
26. Rouw, AC, Somsen, G. The solvation of some alcohols in binary solvents: enthalpies of solution and enthalpies of transfer. J Chem Thermodyn 1981 13:67–76 .
27. Della Volpe, C, Guarino, G, Sarlorio, K, Vitagliano, V. Diffision, viscosity, and refractivity data on the system dimethylformamide–water at 20 and 40 degree C. J Chem Eng Data 1986 31:37–40 .
28. Kawaizimi, F, Ohno, M, Miyahara, Y. Ultrasonic and volumetric investigation of aqueous solutions of amides. Bull Chem Soc Jpn 1977 50:2229–2233 .
29. Manohara, MN, Sivakumar, KV, Rajagopal, E, Subrahmanyam, SV. Excess thermodynamic functions of the systems water + N-methyl formamide and water + N,N-dimethyl formamide. Acustica 1981 48:341–345.
30. Singh, D, Bahadur, L, Ramanamurthi, MV. Conductance studies in amide–water mixtures. II. Sodium salts in N,N-dimethylformamide–water mixtures at 35 °C. J Solut Chem 1977 6:703–715 .
31. Korolev, VP. Preferential solvation of non-electrolytes in mixed solvents. Zh Obsch Khim. 2000;70:1976–1984.