Partial molar volumes of secondary amines in methanol. Specific interactions
1992; Elsevier BV; Volume: 71; Issue: 1-2 Linguagem: Inglês
10.1016/0378-3812(92)85009-w
ISSN1879-0224
AutoresIsabel M. S. Lampreia, Ester F. G. Barbosa,
Tópico(s)Chemical Thermodynamics and Molecular Structure
ResumoLampreia I.M.S. and Barbosa E.F.G., 1992. Partial molar volumes of secondary amines in methanol. Specific interactions. Fluid Phase Equilibria, 71: 125-142. Limiting partial molar volumes, −V∞B, at 25° C, for diethyl-, di-n-propyl-, di-n-butyl- and di-n-hexylamines in methanol were determined from density measurements using a vibrating tube densimeter. Contributions to −V∞B of the secondary amine group and of the interaction of the secondary amine group with methanol, calculated with linear hydrocarbons as reference compounds, have been derived and discussed by using an additive scheme and a hard sphere model respectively. Transference partial molar volumes from benzene to methanol have been calculated and split into various contributions including solvent effects such as the differences in size and in packing density as well as interaction terms. Complementary information about intermolecular interactions in these systems, and in the range of the dilute region studied were obtained by means of excess volumes calculated in terms of Henry's model.
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