RT info:eu-repo/semantics/article
T1 Liquid–Liquid equilibria for systems containing 4-phenylbutan-2-one or benzyl ethanoate and selected alkanes
A1 Alonso Tristán, Cristina
A1 González López, Juan Antonio Mariano
A1 Hevia de los Mozos, Luis Fernando
A1 García de la Fuente, Isaías Laudelino
A1 Cobos Hernández, José Carlos
K1 Termodinámica
K1 2213 Termodinámica
AB The method of the critical opalescence with a laser scattering technique has been employed for the determination of the liquid-liquid equilibrium (LLE) curves for the systems 4-phenylbutan-2-one + CH3(CH2)nCH3 (n = 10,12,14) and for benzyl ethanoate + CH3(CH2)nCH3 (n = 12,14). The mixtures are characterized by having an upper critical solution temperature (UCST), which increases with n. The corresponding LLE curves have a rather horizontal top and become shifted to higher concentration of the polar compound when n is increased. Calorimetric data and LLE measurements show that the aromaticity effect leads to stronger interactions between molecules of the polar compound considered with respect to those between homomorphic linear molecules with the same functional group. 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 relevant in benzyl ethanoate than in ethyl benzoate molecules. The DISQUAC group contribution model represents correctly the coordinates of the critical points of the investigated systems and the symmetry of the LLE curves.
PB ACS Publications
SN 0021-9568
YR 2017
FD 2017
LK https://uvadoc.uva.es/handle/10324/69169
UL https://uvadoc.uva.es/handle/10324/69169
LA spa
NO Journal of Chemical & Engineering Data, 62, 2017, 988-994
DS UVaDOC
RD 18-dic-2024