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EnglishThe data available in the literature for the excess Gibbs energies GE, excess enthalpies HE, activity coefficients γ∞i, and partial molar excess enthalpies hE,∞i at infinite dilution, and excess heat capacities CEP of noncyclic monoethers, polyethers, acetals and orthoesters and of cyclic monoethers + n-alkanes or + cyclohexane are examined on the basis of the DISQUAC group contribution model. The interaction parameters, quasichemical and dispersive, depend on the intramolecular environment of the O atom. There is clear evidence for a steric effect exerted by the alkyl groups adjacent to the O atom, for OCO proximity effect (in acetals and orthoesters), and for a ring strain effect (in cyclic ethers). The steric effect results in a regular decrease of the quasi-chemical interaction parameters; the dispersive parameters remain constant. The proximity effect of O atoms produces a regular decrease, and the ring strain a regular increase, in both the quasi-chemical and the dispersive interaction parameters.
| Autori interni: | ||
| Autori: | KEHIAIAN H.V.; TINE' M; LEPORI L.; MATTEOLI E.; MARONGIU B. | |
| Titolo: | Thermodynamics of binary mixtures containing oxaalkanes. Part 3. Monoethers, polyethers, acetals, orthoesters and cyclic monoethers + n-alkanes or cyclohexane | |
| Anno del prodotto: | 1989 | |
| Digital Object Identifier (DOI): | 10.1016/0378-3812(89)80033-0 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
http://hdl.handle.net/11568/9571
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