RT info:eu-repo/semantics/article
T1 Thermodynamics of amide + amine mixtures. 4. Relative permittivities of N,N-dimethylacetamide + N-propylpropan-1-amine, + N-butylbutan-1-amine, + butan-1-amine, or + hexan-1-amine systems and of N,N-dimethylformamide + aniline mixture at several temperatures. Characterization of amine + amide systems using ERAS
A1 Hevia de los Mozos, Luis Fernando
A1 González López, Juan Antonio Mariano
A1 Cobos Huerga, Ana
A1 García de la Fuente, Isaías Laudelino
A1 Sanz, Luis Felipe
K1 Amides
K1 Amines
K1 Permittivity
K1 Kirkwood correlation factor
K1 Excess functions
K1 ERAS
AB Relative permittivities at 1 MHz and at (293.15-303.15) K are reported for the binary systems N,N-dimethylacetamide (DMA) + N-propylpropan-1-amine (DPA), + N-butylbutan-1-amine (DBA), + butan-1-amine (BA) or + hexan-1-amine (HxA) and for N,N-dimethylformamide (DMF) + aniline. The excess permittivities are large and negative for systems with DMA, whereas they are large and positive for the aniline mixture. From the analysis of these excess permittivity data and of measurements previously reported, it is concluded: (i) the main contribution to the  excess permittivity in systems with linear amines arises from the breaking of interactions between like molecules; (ii) in the DMF + aniline mixture, interactions between unlike molecules contribute positively to the excess permittivity, and such a contribution is dominant; (iii) longer linear amines are better breakers of the amide-amide interactions; (iv) interactions between unlike molecules are more easily formed when shorter linear amines, or DMF, participate. These findings are confirmed by a general study conducted in terms of excess values of molar orientational and induced polarizabilities and of the relative Kirkwood correlation factors for systems and components. The ERAS model is also applied to amide + amine mixtures. ERAS represents rather accurately the excess enthalpies and volumes of the mentioned systems. The variation of the cross-association equilibrium constants, determined using ERAS, with the molecular structure is in agreement with that observed for the excess permittivity.
PB Elsevier
SN 0021-9614
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/31504
UL http://uvadoc.uva.es/handle/10324/31504
LA spa
NO The Journal of Chemical Thermodynamics, Marzo 2018, vol. 118. p. 175–187
NO Producción Científica
DS UVaDOC
RD 18-dic-2024