RT info:eu-repo/semantics/article
T1 Thermodynamics of Amide + Amine Mixtures. 1. Volumetric, Speed of Sound, and Refractive Index Data for N,N-Dimethylformamide + N-Propylpropan-1-amine, + N-Butylbutan-1-amine, + Butan-1-amine, or + Hexan-1-amine Systems at Several Temperatures
A1 Hevia de los Mozos, Luis Fernando
A1 Cobos Huerga, Ana
A1 González López, Juan Antonio Mariano
A1 García de la Fuente, Isaías Laudelino
A1 Sanz del Soto, Luis Felipe
K1 Termodinámica
K1 2213 Termodinámica
AB Values of density (ρ), speed of sound (c) and refractive index (n_D) for N,N-dimethylformamide (DMF) + N-propylpropan-1-amine (DPA) or + butan-1-amine (BA) mixtures at (293.15-303.15) K, and for DMF + N-butylbutan-1-amine (DBA) or hexan-1-amine (HxA) mixtures at 298.15 K are reported. Density and speed of sound measurements were conducted using a vibrating-tube densimeter and sound analyzer, Anton Paar model DSA5000; refractive index, n_D, values were obtained by means of a RFM970 refractometer from Bellingham+Stanley. The experimental ρ, c and n_D values have been used to determine excess molar volumes, V_m^E, excess adiabatic compressibilities, κ_S^E, excess speeds of sound, c^E, excess thermal expansion coefficients, α_p^E, and excess refractive indices, n_D^E. This set of data show the existence of interactions between unlike molecules and of structural effects in the mixtures under study. V_m^E values of solutions including linear secondary amines are lower than those of mixtures with linear primary amines. In fact, the contribution to V_m^E from the breaking of amine-amine interactions is larger for the latter systems. Calculations on Rao’s constant point out that there is no complex formation between the mixture components. Dispersive interactions have been analyzed by means of the molar refraction. It is shown that solutions with DPA or HxA are characterized by similar dispersive interactions and that they mainly differ in dipolar interactions.
PB ACS publications
SN 0021-9568
YR 2016
FD 2016
LK https://uvadoc.uva.es/handle/10324/69167
UL https://uvadoc.uva.es/handle/10324/69167
LA spa
NO Journal of Chemical & Engineering Data, 61, 2016, 1468-1478
DS UVaDOC
RD 28-nov-2024