Handbook of Solvents - George Wypych - ChemTech - Ventech!

764 Roland Schmid
Solvent ΔvH/RT ΔvSo/R -Sex/R gK
Py 16.20 15.22 0.98
MeCN 13.40 12.37 1.03 1.18
Me2CO 12.50 11.40 1.10 1.49
MeOAc 13.03 11.79 1.24
EtCN 14.53 13.25 1.28 1.15
PhNO2 22.19 20.89 1.30 1.56
MeNO2 15.58 14.10 1.48 1.38
NMP 21.77 20.25 1.52 1.52
EtOAc 14.36 12.76 1.60
DMSO 21.33 19.30 2.03 1.67
DMF 19.19 17.04 2.15 1.60
DMA 20.26 18.04 2.22 1.89
HMPA 24.65 22.16 2.49 1.44
PhCN 21.97 19.41 2.56
NMF 22.69 19.75 2.94 4.52
n-C11 22.76 19.66 3.10
FA 24.43 21.26 3.17 2.04
H2O 17.71 14.49 3.22 2.79
MeOH 15.10 11.72 3.38 2.99
n-C13 26.72 22.51 4.21
EtOH 17.07 12.85 4.22 3.08
PC 26.33 22.06 4.27 1.86
n-PrOH 19.14 14.29 4.85 3.23
n-BuOH 21.12 15.90 5.22 3.26
The calculations for some common liquids are given in Table 13.1.6 ordered according
to decreasing S ex. An important result is the appreciable order produced by the hydrocarbon
chain relative to polar groups and hydrogen-bonding effects. For instance, S ex would
project for water the same degree of order as for undecane. In like terms, ethanol is comparable
to tridecane. However, the same magnitude of the excess entropy does by no means
imply that ordering is similar. Much of the orientational ordering in liquids composed of
elongated molecules is a consequence of efficient packing such as the intertwining of
chains. In contrast, the structure of water is largely determined by strong electrostatic interactions
leading to sharply-defined directional correlations characteristic of H-bonding. Although
contrary to chemical tradition, there are other indications that the longer-chain
hydrocarbon liquids are to be classified as highly structured as judged from