Chemistry Reference
In-Depth Information
0.50
0.50
0.30
0.10
0.25
0.00
-0.10
-0.30
-0.25
-0.50
-0.5
0.00
-0.70
0.20
0.40
0.60
0.80
1.00
0.00
0.20
0.40
0.60
0.80
1.00
x
(2-Methylpyrrolidin-2-one)
x
(CH
3
SOCH
3
)
0.50
0.50
0.25
0.25
0.00
0.00
-0.25
-0.25
-0.50
-0.50
0.00
0.20
0.40
0.60
0.80
1.00
0.00
0.20
0.40
0.60
0.80
1.00
x
(H
2
O
2
)
x
(CH
3
OH)
0.50
0.50
0.25
0.25
0.00
0.00
-0.25
-0.25
-0.50
-0.50
0.00
0.20
0.40
0.60
0.80
1.00
0.00
0.20
0.40
0.60
0.80
1.00
x
(HOC
2
H
4
OH)
x
(Glycerol)
FIGURE 3.2
Volume-corrected preferential solvation parameters
δ
x
′
WW
(
●
) for water-water
interactions and
δ
x
′
WS
(
▲
) for water-solute interactions in the first solvation shell of aque-
ous mixtures with solutes identified in the label of the abscissa. (From Y. Marcus, 2001,
Preferential Solvation in Mixed Solvents, Part 10, Completely Miscible Aqueous Co-Solvent
Binary Mixtures at 298.15 K,
Monatshefte für Chemie
, 132, 1387, by permission of the pub-
lisher, Springer.)
Hydrogen peroxide
(Figure 3.2)
.
The δ
x
′
WW
has small negative values (down to
-0.013 at
x
S
= 0.70) and δ
x
′
WS
has small positive values (up to 0.009 at
x
S
= 0.35). This
system is close to ideal and preferential solvation is hardly significant.
Methanol
(Figure 3.2). This system was studied over a wide temperature range,
from subambient to near the critical point. The δ
x
′
WW
at 298 K has small positive
