2026-05-05T20:51:36Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/691632024-07-29T19:01:52Zcom_10324_1157com_10324_931com_10324_894col_10324_1298

González López, Juan Antonio Mariano Sanz del Soto, Luis Felipe Hevia de los Mozos, Luis Fernando García de la Fuente, Isaías Laudelino Cobos Hernández, José Carlos Termodinámica The systems C6H5Cl, or C6H5Br, or 1-chloronaphthalene, or 1,2,4-trichlorobenzene, or 1-methylnaphthalene, or 1,2,4-trimethylbenzene + alkane have been investigated by means of the their excess molar properties, including, when the needed data are available, those at constant volume, internal energies (U_Vm^E) and heat capacities (C_Vm^E), and using the DISQUAC, and Flory models, and the concentration-concentration structure factor formalism. The position of the mixtures within the G_m^E (excess molar Gibbs energy) vs. H_m^E (excess molar enthalpy) diagram has been also determined. Interactions between C6H5X molecules become stronger in the sequence X = H ≈ F≈Cl < Br. These interactions are weaker than those between 1-chloronaphtahlene or 1,2,4-trichlorobenzene molecules. It is shown that the considered systems have some common features: dispersive interactions are dominant, structural effects for solutions with shorter n-alkanes are large and U_Vm^Edecreases when the number (n) of C atoms of the alkane increases. This variation is held when an n-alkane is replaced by a branched alkane with the same n in systems with C6H5Cl or 1-chloronaphthalene. This suggests that larger alkanes are poorer breakers of the interactions between aromatic halogenated compounds. Viscosity and C_Vm^E data support this conclusion. The parabolic dependence of C_Vm^E with n indicates that the short orientational order of long n-alkanes is destroyed. Aromaticity and proximity effects are discussed. 2024-07-25 2024-07-25 2022 info:eu-repo/semantics/article Journal of Molecular Liquids, 2022, 348, 118282 0167-7322 https://uvadoc.uva.es/handle/10324/69163 10.1016/j.molliq.2021.118282 118282 Journal of Molecular Liquids 348 spa https://doi.org/10.1016/j.molliq.2021.118282 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier