Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/69170
Título
Orientational effects in alkanone, alkanal or dialkyl carbonate + alkane mixtures and in alkanone + alkanone or + dialkyl carbonate systems
Autor
Año del Documento
2017
Editorial
Elsevier
Documento Fuente
Journal of Molecular Liquids, 2017, 233, 517-527
Resumo
Interactions and structure of alkanone, or alkanal or dialkyl carbonate + alkane mixtures, or of 2-alkanone+ 2-alkanone, or of ketone + dialkyl carbonate systems have been investigated by means of a set of thermodynamic properties and by the application of the Flory model. The properties considered are excess molar quantities: enthalpies, H_m^E, volumes, V_m^E, or isobaric heat capacities, C_pm^E, and liquid-liquid equilibria. Experimental data show that alkane mixtures are characterized by rather strong dipolar interactions. In the case of systems containing ketones with the same number of C atoms and a given alkane, dipolar interactions become weaker in the sequence: aromatic > cyclic > linear. In addition, the mentioned interactions become also weaker in the order: dialkyl carbonate > linear alkanone > linear alkanal. This is an important result, as carbonates show lower effective dipole moments than the other compounds, and it suggests that the group size may be relevant when evaluating thermodynamic properties of liquid mixtures. Results on H_m^E from the Flory model show that orientational effects (i.e., non-random mixing) are rather similar for systems with linear, cyclic or aromatic ketones or alkanals and alkanes. In contrast, orientational effects become weaker in dialkyl carbonate + alkane mixtures. The behaviour of 2-alkanone + 2-alkanone systems and of mixtures of longer 2-alkanones or cyclohexanone with dialkyl carbonate is close to random mixing. Larger orientational effects are encountered in solutions of carbonates and shorter 2-alkanones.
Materias (normalizadas)
Termodinámica
Materias Unesco
2213 Termodinámica
ISSN
0167-7322
Revisión por pares
SI
Patrocinador
Ministerio de Educación, Cultura y Deporte (MECD): Grant FPU14/04104
Junta de Castilla y León Regional Grant BU034U16
Junta de Castilla y León Regional Grant BU034U16
Version del Editor
Idioma
spa
Tipo de versión
info:eu-repo/semantics/submittedVersion
Derechos
openAccess
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