Enthalpies of interaction of aromatic solutes with organic solvents

Abstract

Heats of solution of several aromatic solutes (benzene, toluene, mesitylene, nitrobenzene, α,α,α-trifluorotoluene, anisole) and model compounds (n-butyl methyl ether, cyclohexane) in 17 organic solvents (n-heptane, cyclohexane, carbon tetrachloride, 1,2-dichloroethane, α,α,α-trifluorotoluene, triethylamine, butyl ether, ethyl acetate, dimethylformamide, dimethyl sulfoxide, benzene, toluene, mesitylene, t-butyl alcohol, 1-octanol, methanol, 2,2,2-trifluoroethanol) have been combined with solute heats of vaporization to give enthalpies of transfer from vapor to solvent (ΔH(v → S)). Differences between solute and model values (ΔΔH(v → S) = ΔH(v → S) (aromatic solute)–ΔH(v → S) (model) were used to evaluate aromatic solute–solvent polar interactions. Correlations of ΔΔH(v → S) with solvent dipolarity–polarizability (Taft–Kamlet π* parameter) have been determined.

A rigorous method to evaluate the consistency of experimental data in phase equilibria. Application to VLE and VLLE

“…The application was tested on a set of 270 zeotropic and azeotropic systems of homogeneous binary solutions and 30 non‐homogeneous systems. In addition to the VLE data, values of the excess properties ( v E and h E ) have been used and, also, LLE data of the system studied, extracted from the literature,…”

High Resolution Mass Spectrometric View of Asphaltene–SiO2 Interactions

“…Additionally, we believe that the aromatic moieties of the molecules composing the DM fraction are also exposed so that they can interact with silanol groups through weak hydrogen bonds. Many authors have reported nonclassic hydrogen bonding between aromatic moieties and silica surfaces. , Figures S-15–S-19 of the Supporting Information show the molecular composition of common classes in W, WD, NE, DM, and T.…”

“…Many authors have reported nonclassic hydrogen bonding between aromatic moieties and silica surfaces. 66,67…”

Heats of Adsorption from Liquid Solutions and from Pure Vapor Phase: Adsorption of Thiophenic Compounds on NaY and 13X Zeolites

“…Many studies have been performed by Fuchs et al , on the determination of enthalpies of interaction of polar and nonpolar solutes with polar or nonpolar solvents, and many organic compounds have been tested. Solomonov et al have developed methods for extracting the enthalpy of specific solute−solvent interaction based on the basic relationship above (eq 11).…”

“…There is lacking of data of their enthalpies of sublimation or lattice energies which are to be estimated. The calorimetric procedure described in the literature was followed . The results are summarized in Table .…”