Thermophysical Properties, Raman and FTIR Spectroscopy, and Their Correlations for the Butylamine (1)+2-Butanone (2) System

In this paper, we reported density rho and viscosity eta measurements for pure butylamine and 2-butanone as well as for the binary system [butylamine (1) + 2-butanone (2)] over the whole composition range and at the temperature range of (288.15-318.15) K. Experimental data were fitted to empirical equations, which allow for the calculation of these properties for the pure components and binary system over the whole concentration and temperature ranges studied. In the same way, experimental data of the binary system were further used to calculate the excess molar volume V (E) and viscosity deviation Delta eta as a function of composition and temperature using an extended Redlich-Kister [Redlich, O.; Kister, A. T. Algebraic Representation of Thermodynamic Properties and the Classification of Solutions. Ind. Eng. Chem. 1948, 40, 345-348] equation type. The experimental data of the excess molar enthalpy H-E for all binary systems and the (vapor + liquid) equilibrium isotherm for binary system [butylamine (1) + 2-butanone (2)] at 298.15 K were also reported, and the excess Gibbs energy G(E) and excess entropy S(E )were calculated. The binary system [butylamine (1) + 2-butanone (2)] exhibits an azeotrope and negative deviation from the ideal behavior. On the other hand, the Raman and FTIR spectra confirm molecular associations, heteroassociations, and the inferences obtained from thermophysical properties for binary system [butylamine (1) + 2- butanone (2)].