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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/4395

    Título
    Orientational effects in alkanone, alkanal or dialkyl carbonate + alkane mixtures and in alkanone + alkanone or + dialkyl carbonate systems
    Autor
    Hevia de los Mozos, Fernando
    González López, Juan Antonio
    Alonso Tristán, CristinaUBU authority Orcid
    García de la Fuente, Isaías
    Sanz, Luis Felipe
    Publicado en
    Journal of Molecular Liquids. 2017, V. 233, p. 517–527
    Editorial
    Elsevier
    Fecha de publicación
    2017-05
    Abstract
    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, HmE, volumes, VmE, or isobaric heat capacities, CpmE, 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 HmE 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 behavior 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.
    Palabras clave
    Polar compound
    Steric
    Cyclization
    Aromaticity
    Flory
    Orientational effects
    Materia
    Electrical engineering
    Electrotecnia
    URI
    http://hdl.handle.net/10259/4395
    Versión del editor
    http://dx.doi.org/10.1016/j.molliq.2017.03.014
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