Abstract
The static dielectric constant of equimolar mixtures of formamide+N,N-dimethylformamide and formamide+2-aminoethanol mixed with water, ethyl alcohol, dimethylsulphoxide, and 1,4-dioxane were measured over the entire composition range at 303.15 K. The concentration-dependent non-linear behavior of the dielectric constant of the ternary mixtures confirms the formation of hydrogen-bond interactions between the mixture constituents. The excess dielectric-constant values of the mixtures were determined and discussed in view of the strength of hydrogen-bond interactions and the nature of dipolar ordering. It is found that in ternary mixtures, water acts as a structure-maker and ethyl alcohol, dimethylsulphoxide, and 1,4-dioxane act as structure-breakers for the equimolar formamide+N,N-dimethylformamide and formamide+2-aminoethanol binary structures.
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Sengwa, R.J., Choudhary, S. & Khatri, V. Studies on Hydrogen-Bond Interactions in Ternary Mixtures of Polar Solvents by Dielectric Constant Measurements. Int J Thermophys 32, 2050–2061 (2011). https://doi.org/10.1007/s10765-011-1086-8
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DOI: https://doi.org/10.1007/s10765-011-1086-8