RT info:eu-repo/semantics/article
T1 Thermodynamics of Amide + Amine Mixtures. 2. Volumetric, Speed of Sound and Refractive Index Data for N,N-Dimethylacetamide + 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 Alonso Gómez, Víctor
K1 Termodinámica
K1 2213 Termodinámica
AB Data on density, ρ, speed of sound, c, and refractive index, n_D, of binary systems containing N,N-dimethylacetamide (DMA) + N-propylpropan-1-amine (DPA) or + butan-1-amine (BA) at 293.15 K, 298.15 K and 303.15 K, and + N-butylbutan-1-amine (DBA) or + hexan-1-amine (HxA) at 298.15 K are reported. A densimeter and sound analyzer Anton Paar DSA 5000 has been used for the measurement of ρ and c, whereas n_D values have been obtained by means of a refractometer RFM970 from Bellingham+Stanley. Also, values of excess molar volumes, V_m^E, excess isentropic compressibilities, κ_S^E, excess speeds of sound, c^E, excess isobaric thermal expansion coefficients, α_p^E, and of excess refractive indices, n_D^E, have been determined from these data. The investigated systems are characterized by amide-amine interactions and structural effects, as it is shown by their negative or low positive V_m^E values and by the results from the application of the Prigogine-Flory-Patterson (PFP) model. The breaking of amine-amine interactions is more relevant in systems containing linear primary amines than in those with linear secondary amines, and the V_m^E values are lower for the latter systems. Molar refraction has been used to evaluate the dispersive interactions in the mixtures under study, yielding the result that DPA and HxA systems present similar dispersive interactions and mainly differ in their dipolar character. Steric hindrance of the amide group in DMA leads to weaker amide-amine interactions than in the corresponding N,N-dimethylformamide (DMF) + amine systems.
PB Springer
SN 0095-9782
YR 2016
FD 2016
LK https://uvadoc.uva.es/handle/10324/69168
UL https://uvadoc.uva.es/handle/10324/69168
LA spa
NO Journal of Solution Chemistry, 2017, 46, 150-174
DS UVaDOC
RD 27-jul-2024