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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/4697

    Título
    Orientational Effects and Random Mixing in 1-Alkanol + Alkanone Mixtures
    Autor
    González, Juan Antonio
    Mediavilla Trabada, ÁngelaUBU authority
    García de la Fuente, Isaías
    Cobos, José Carlos .
    Alonso Tristán, CristinaUBU authority Orcid
    Riesco, Nicolás
    Publicado en
    Industrial & Engineering Chemistry Research. 2013, V. 52, n. 30, p.10317–10328
    Editorial
    American Chemical Society
    Fecha de publicación
    2013-07
    ISSN
    0888-5885
    DOI
    10.1021/ie4019269
    Abstract
    1-Alkanol + alkanone systems have been investigated through the data analysis of molar excess functions, enthalpies, isobaric heat capacities, volumes and entropies, and using the Flory model and the formalism of the concentrationconcentration structure factor (SCC(0)). The enthalpy of the hydroxyl-carbonyl interactions has been evaluated. These interactions are stronger in mixtures with shorter alcohols (methanol-1-butanol) and 2-propanone or 2-butanone. However, effects related to the self-association of alcohols and to solvation between unlike molecules are of minor importance when compared with those which arise from dipolar interactions. Physical interactions are more relevant in mixtures with longer 1-alkanols. The studied systems are characterized by large structural effects. The variation of the molar excess enthalpy with the alcohol size along systems with a given ketone or with the alkanone size in solutions with a given alcohol are discussed in terms of the different contributions to this excess function. Mixtures with methanol show rather large orientational effects. The random mixing hypothesis is attained to a large extent for mixtures with 1-alkanols ≠ methanol and 2-alkanones. Steric effects and cyclization lead to stronger orientational effects in mixtures with 3-pentanone, 4-heptanone, or cyclohexanone. The increase of temperature weakens orientational effects. Results from SCC(0) calculations show that homocoordination is predominant and support conclusions obtained from the Flory model.
    Materia
    Electric engineering
    Ingeniería eléctrica
    URI
    http://hdl.handle.net/10259/4697
    Versión del editor
    https://doi.org/10.1021/ie4019269
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