Volumetric and spectroscopic properties of binary liquid mixtures of 1, 2-ethylenediamine with 1, 4-butanediol at varying temperature

The new experimental values of density (ρ) for 1,2-ethylenediamine (EDA), 1, 4-butanediol (BDO), and their binary mixtures were reported in the whole mole fraction of 1,2-ethylenediamine at 0.1 MPa pressure and a temperature from 293.15 K to 313.15 K. Using experimental results, molar volume $\left(V_m\right)$, excess molar volume $\left(V_m^E\right)$ was calculated. The observed $V_m^E$ values were interrelated to Redlich-Kister (R-K) polynomial equation. Further, utilizing Prigogine-Flory-Patterson theory, the $V_m^E$ was theoretically analyzed. Furthermore, apparent molar volumes $\left(V_{m,\varphi ,1}\right)$ and $\left(V_{m,\varphi ,2}\right)$, partial molar volumes $\left({\overline{V}}_{m,1}and{\overline{V}}_{m,2}\right)$, and excess partial molar volumes $\left({\overline{V}}_{m,1}^E,and{\overline{V}}_{m,2}^E\right)$ over the whole mole fraction range, also, partial molar volumes $\left({\overline{V}}_{m,1}^o,and{\overline{V}}_{m,2}^o\right)$ and excess partial molar volumes $\left({\overline{V}}_{m,1}^{oE},and{\overline{V}}_{m,2}^{oE}\right)$ of the 1,2-ethylenediamine and 1,4-butanediol at infinite dilution were computed. Based on the results, the hydrogen-bonding were determined. Additionally, using ¹H-NMR the creation of new H-bonding interaction between EDA and BDO molecules was confirmed.