Partial molar volumes of organic solutes in water. XXIII. Cyclic ketones at T= (298 to 573) K and pressures up to 30 MPa

Group contribution method for standard molar volumes of aqueous aliphatic alcohols, ethers and ketones over extended ranges of temperature and pressure

“…This observation is in accord with negative values of ''cyclization parameters'' evaluated from group additivity approach applied to extensive set of data at 298.15 K and atmospheric pressure [14] and with a note presented by Høiland [15]. It should be pointed out that due to the rather low number of solutes no separate cyclization structural contributions were incorporated in the evaluations [11,13,16] and therefore the effect of cyclization is implicitly included in the depicted contributions. Table 2 compares group contributions at T = 298.15 K and p = 0.1 MPa evaluated in this work with the values taken from several literature sources.…”

“…On the other hand, the co-volume evaluated as the adjustable parameter from experimental data is several times greater than the co-volume given by the theory. The agreement in the co-volume evaluated in this work and that obtained for cyclic ethers might be accidental and, of course, depends on the selection of the value for Despite that the co-volume should be soluteindependent, much larger values (about 19 cm 3 Á mol À1 around ambient temperatures and pressures) were obtained for aqueous cyclic ketones [13]. The deviation is likely to be caused by enolization and new experimental data are needed to bring the light into this problem as discussed in [13].…”

“…cyclic ethers [10,11], cyclic ketones [12,13]). Its value is, however, several times greater than the theoretical one.…”

“…In our case, the contribution of the carbonyl group is derived from data for one ketone (pentan-3-one) and that of the ether oxygen atom from data for limited number of polyethers. [11], ---cyclic ketones [13], -Á -cyclic alkanols [16].…”

Molecular interactions between amine and cyclic ketones at different temperatures

“…In recent years, several studies have been advanced to study thermodynamic and transport properties of binary liquid mixtures containing ketones [5][6][7][8][9][10][11][12][13][14][15]. A perusal of the literature reveals that the thermo-physical property studies on the binary mixtures containing N,N-diethylaniline are not yet reported.…”