RT info:eu-repo/semantics/article
T1 Thermodynamics of mixtures containing a very strongly polar compound. 12. Systems with nitrobenzene or 1-nitroalkane and hydrocarbons or 1-alkanols
A1 González López, Juan Antonio
A1 Hevia de los Mozos, Fernando
A1 Sanz, Luis Felipe
A1 García de la Fuente, Isaías
A1 Alonso Tristán, Cristina
K1 Nitroalkanes
K1 1-alkanols
K1 Thermophysical data
K1 Models
K1 Dipolar interactions
K1 Electrical engineering
K1 Electrotecnia
AB Mixtures involving nitrobenzene and hydrocarbons, or 1-alkanols and 1-nitroalkane, or nitrobenzene have been investigated on the basis of a whole set of thermophysical properties available in the literature. The properties considered are: excess molar functions (enthalpies, entropies, isobaric heat capacities, and volumes), vapour-liquid and liquid-liquid equilibria, permittivities or dynamic viscosities. In addition, the mixtures have been studied by means of the application of the DISQUAC, ERAS, and UNIFAC models, and using the formalism of the concentration-concentration structure factor. The corresponding interaction parameters in the framework of the DISQUAC and ERAS models are reported. In alkane mixtures, dipolar interactions between 1-nitroalkane molecules are weakened when the size of the polar compound increases, accordingly with the relative variation of their effective dipolar moment. Dipolar interactions are stronger in nitrobenzene solutions than in those containing the smaller 1-nitropropane, although both nitroalkanes have very similar effective dipole moment (aromaticity effect). Systems with 1-alkanols are characterized by dipolar interactions between like molecules which sharply increases when the alkanol size increases. Simultaneously, interactions between unlike molecules become weaker, as the OH group is then more sterically hindered. Interactions between unlike molecules are stronger in systems with nitromethane than in nitrobenzene solutions. The replacement of nitromethane by nitroethane in systems with a given 1-alkanol leads to strengthen those effects related with the alcohol self-association. Permittivity data and results on Kirkwood's correlation factors show that the addition of 1-alkanol to a nitroalkane leads to cooperative effects, which increase the dipolar polarization of the solution, in such way that the destruction of the existing structure in pure liquids is partially counterbalanced. This effect is less important when longer 1-alkanols are involved.
PB Elsevier
SN 0378-3812
YR 2018
FD 2018-09
LK http://hdl.handle.net/10259/4790
UL http://hdl.handle.net/10259/4790
LA eng
NO Consejería de Educación y Cultura of Junta de Castilla y León, under Project BU034U16
DS Repositorio Institucional de la Universidad de Burgos
RD 24-nov-2024