2026-05-05T19:21:54Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/646262024-07-29T19:01:34Zcom_10324_1157com_10324_931com_10324_894col_10324_1298

González López, Juan Antonio Mariano Hevia de los Mozos, Luis Fernando Sanz, Luis Felipe Lozano Martín, Daniel García de la Fuente, Isaías Laudelino Cobos Hernández, José Carlos 2024-01-17T08:04:18Z 2024-01-17T08:04:18Z 2024 Fluid Phase Equilibria, 2024, vol. 578, 114012 0378-3812 https://uvadoc.uva.es/handle/10324/64626 10.1016/j.fluid.2023.114012 114012 Fluid Phase Equilibria 578 Producción Científica The CH3(CH2)uCOO(CH2)vCH3 + n-alkane mixtures have been investigated on the basis of an experimental database containing effective dipole moments of esters, and excess molar functions of the systems: enthalpies (HEm), volumes (VEm ), isobaric heat capacities (CEpm ) and isochoric internal energies (UEVm ) and by means of the application of the Flory model and the Kirkwood-Buff formalism. The situation of the mixtures within theGEm (excess molar Gibbs energy) vs. HEm diagram has also been briefly considered. Results indicate that dispersive interactions are dominant and that steric effects can explain some differences between solutions containing heptane and isomeric esters. Proximity and orientational effects are also discussed in diester + hexane mixtures. In the case of systems with a given alkane and different isomeric polar compounds, orientational effects become weaker in the order: n-alkanone > dialkyl carbonate > n-alkanoate. Results from the Kirkwood-Buff formalism indicate that the number of ester-ester interactions decreases in systems with alkyl ethanoates when the alkyl size increases and that preferential solvation between polar molecules decreases as follows: dialkyl carbonate > n-alkanone > n-alkanoate. Ministerio de Ciencia e Innovación /AEI/10.13039/501100011033/ FEDER (PID2022-137104NA-I00) application/pdf eng Elsevier info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ © 2023 The Authors Attribution-NonCommercial-NoDerivatives 4.0 Internacional Thermodynamics Alkanoates Orientational effects Steric effects Alcanoatos Efectos de orientación Efectos estéricos 22 Física Orientational and steric effects in linear alkanoates + N-Alkane mixtures info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.sciencedirect.com/science/article/pii/S0378381223002923?via%3Dihub SI