2026-04-17T08:01:37Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/46982024-11-05T11:06:37Zcom_10259_4393com_10259_5086com_10259_2604col_10259_4394

Alonso Tristán, Cristina 23 500 0000-0003-4733-7391 González López, Juan Antonio 6258fd6c-c3fd-4a03-899d-b967f9c11638 600 Hevia de los Mozos, Fernando 8f74831b-80a4-473f-8e62-91b3861e68bb 600 García de la Fuente, Isaías df93aa25-48ce-4b58-a493-8e7d15de3821 500 Cobos, José Carlos . 8d80973a-4102-4100-912c-9e9f2a08cfef 500 2018-01-16T08:54:51Z 2018-03-09T03:45:06Z 2017-03 0021-9568 http://hdl.handle.net/10259/4698 10.1021/acs.jced.6b00803 Liquid−liquid equilibrium (LLE) phase diagrams have been determined, by means of the critical opalescence method with a laser scattering technique, for the mixtures 4-phenylbutan-2- one + CH3(CH2)nCH3 (n = 10,12,14) and for benzyl ethanoate + CH3(CH2)nCH3 (n = 12,14). The systems are characterized by having an upper critical solution temperature (UCST), which increases with n. The corresponding LLE curves show a rather horizontal top and become skewed toward higher mole fractions of the polar compound when n is increased. Calorimetric and LLE measurements show that, for mixtures with molecules with a given functional group, interactions between aromatic molecules are stronger than those between homomorphic linear molecules (aromaticity effect). This has been ascribed to proximity effects arising from the presence of the polar group and the aromatic ring within the same molecule. Proximity effects become weaker in the sequence 1-phenylpropan-2-one >4-phenylbutan-2-one >1-phenylethanone and are more important in benzyl ethanoate than in ethyl benzoate molecules. Values of the critical compositions and temperatures calculated with the DISQUAC group contribution model are in good agreement with the experimental results. Accordingly, the shape of the LLE curves is also correctly described by DISQUAC. Junta de Castilla y León, under Project BU034U16 application/pdf eng American Chemical Society Journal of Chemical and Engineering Data. 2017, V. 62, n. 3, p. 988–994 https://doi.org/10.1021/acs.jced.6b00803 info:eu-repo/grantAgreement/JCyL/BU034U16 Electrical engineering Electrotecnia Liquid–Liquid Equilibria for Systems Containing 4-Phenylbutan-2-one or Benzyl Ethanoate and Selected Alkanes info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion info:eu-repo/semantics/openAccess THUMBNAIL Alonso-JCED_2017.pdf.jpg Alonso-JCED_2017.pdf.jpg IM Thumbnail image/jpeg 3851 https://riubu.ubu.es/bitstream/10259/4698/4/Alonso-JCED_2017.pdf.jpg 73057250c69e81e865e6cc0f5eac682d MD5 4 ORIGINAL Alonso-JCED_2017.pdf Alonso-JCED_2017.pdf application/pdf 426400 https://riubu.ubu.es/bitstream/10259/4698/1/Alonso-JCED_2017.pdf 95f3c85328a25eef84f5ec318d3b57d7 MD5 1 LICENSE license.txt license.txt text/plain; charset=utf-8 999 https://riubu.ubu.es/bitstream/10259/4698/2/license.txt b295bcbce42e2caabeb0c623d3860c06 MD5 2 TEXT Alonso-JCED_2017.pdf.txt Alonso-JCED_2017.pdf.txt Extracted text text/plain 39941 https://riubu.ubu.es/bitstream/10259/4698/3/Alonso-JCED_2017.pdf.txt 767854569460a598639da1758b6e09ba MD5 3 10259/4698 oai:riubu.ubu.es:10259/4698 2024-11-05 12:06:37.589 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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