Molecular interactions in 2-isopropoxy ethanol plus alcohols: A thermo-physical and spectroscopic approach

作者：Kaur Prabjot; Dubey Gyan Prakash

来源：Journal of Molecular Liquids, 2016, 218: 246-254.

DOI：10.1016/j.molliq.2016.02.068

• Excess molar volume
• Molar isentropic compressibility
• Deviation in speed of sound
• FT-IR
• H-1 NMR

As a continuation of thermodynamic study of binary liquid mixture of alkoxy alkanols, this paper reports new measurement of densities rho and speeds of sound u of 2-isopropoxy ethanol (CH3)(2)CH2OC2H4OH, 1-propanol CH3(CH2)(2)OH, 2-propanol (CH3)(2)CHOH, 1-butanol CH3(CH2)(3)OH and 2-butanol CH3CH2CH(OH)CH3 and their binary mixtures with 2-isopropoxy ethanol as a common component, measured at 293.15, 298.15, 303.15, 308.15 and 313.15 K and viscosities eta measured at 298.15, 303.15 and 308.15 K over the entire composition range. These experimental data were used to calculate the values of excess molar volume V-m(E), excess molar isentropic compressibilities K-S,m(E), deviation in viscosities Delta eta, excess Gibbs free energies Delta G*E and deviation in speed of sound u(D) at all mole fractions of 2-isopropoxy ethanol. The observed variations of these properties, with composition and temperature, are discussed in terms of molecular interactions due to physical and chemical effects between the unlike molecules of the binary mixtures. These properties, especially excess functions, are found to be quite sensitive towards the intermolecular interactions in liquid mixtures. These excess functions and deviations have also been correlated using Redlich-Kister type polynomial equation by the method of least-squares for the estimation of the binary coefficients and the standard errors. FT-IR and H-1 NMR studies of these mixtures are also reported.

• 出版日期2016-6