2
0
2011
ser
mar
0
journal
Original
Serwicka, K.[Kamila]
Marczak, W.[Wojciech]
Int. J. Thermophys.
2011
2020-09-29
Association in Dilute Aqueous Solution of Pyridine and Its Methyl Derivatives Studied by Cryoscopic Method
Pyridine and its methyl derivatives form complexes with water due to hydrogen bonds. The co-operative nature of the hydrogen bonds leads to the association of the complexes and to various modes of hydration. The degrees of association of monohydrate complexes have been calculated for liquid dilute aqueous solutions of pyridine, 2-, 3-, 4-methylpyridine, and 2,6-dimethylpyridine at temperatures from 273 K to 268.5 K. The association number increases with an increase of the amine concentration. Positive correlation was found between the degree of association of the 1:1 water amine complexes and the size of microheterogeneities. It was shown that the mechanics of this process involves hydrogen bonding and van der Waals interactions.
pyridines
hydrogen bond
association
aqueous solutions
solid - liquid equilibrium
freezing curves
10.1007/s10765-010-0792-y
4
32
867-875
1
InChI=1S/H2O/h1H2
XLYOFNOQVPJJNP-UHFFFAOYSA-N
water
H2O
1
Commercial source
1
99.5
3
Estimated by the compiler
2
InChI=1S/C5H5N/c1-2-4-6-5-3-1/h1-5H
JUJWROOIHBZHMG-UHFFFAOYSA-N
pyridine
azine
C5H5N
1
Commercial source
3
InChI=1S/C6H7N/c1-6-3-2-4-7-5-6/h2-5H,1H3
ITQTTZVARXURQS-UHFFFAOYSA-N
3-methylpyridine
.beta.-picoline
3-picoline
C6H7N
1
Commercial source
4
InChI=1S/C6H7N/c1-6-2-4-7-5-3-6/h2-5H,1H3
FKNQCJSGGFJEIZ-UHFFFAOYSA-N
4-methylpyridine
.gamma.-picoline
4-picoline
C6H7N
1
Commercial source
5
InChI=1S/C6H7N/c1-6-4-2-3-5-7-6/h2-5H,1H3
BSKHPKMHTQYZBB-UHFFFAOYSA-N
2-methylpyridine
.alpha.-picoline
2-picoline
C6H7N
1
Commercial source
6
InChI=1S/C7H9N/c1-6-4-3-5-7(2)8-6/h3-5H,1-2H3
OISVCGZHLKNMSJ-UHFFFAOYSA-N
2,6-dimethylpyridine
2,6-lutidine
pyridine, 2,6-dimethyl-
C7H9N
1
Commercial source
1
2
1
1
1
Principal objective of the work
KNA
TRC
6/21/2011
1
Solid-liquid equilibrium temperature, K
VISOBS
Liquid
Difference with the reference state, X-X(REF)
Pure solvent at the temperature of the same phase equilibrium
Crystal
1
1
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
Crystal
1
1
Pressure, kPa
Liquid
101
3
1
Mole fraction
2
Liquid
1
0.0085
2
1
-1
2
1
0.5
1
0.0107
3
1
-1
2
1
0.5
1
0.0144
3
1
-1.5
2
1
0.5
1
0.0221
3
1
-2
2
1
0.5
1
0.0301
3
1
-2.5
2
1
0.5
1
0.0484
3
1
-3
2
1
0.5
1
0.0586
3
1
-3.5
2
1
0.5
1
0.0695
3
1
-4
2
1
0.5
1
0.0793
3
1
-4
2
1
0.5
1
0.1007
4
1
-4.5
2
1
0.5
2
3
1
1
1
Principal objective of the work
KNA
TRC
6/21/2011
1
Solid-liquid equilibrium temperature, K
VISOBS
Liquid
Difference with the reference state, X-X(REF)
Pure solvent at the temperature of the same phase equilibrium
Crystal
1
1
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
Crystal
1
1
Pressure, kPa
Liquid
101
3
1
Mole fraction
3
Liquid
1
0.0071
2
1
-0.5
1
1
0.5
1
0.0089
2
1
-0.5
1
1
0.5
1
0.012
3
1
-1
2
1
0.5
1
0.0185
3
1
-1
2
1
0.5
1
0.0253
3
1
-1
2
1
0.5
1
0.0403
3
1
-1.5
2
1
0.5
1
0.0488
3
1
-1.5
2
1
0.5
1
0.058
3
1
-2
2
1
0.5
1
0.0663
3
1
-2
2
1
0.5
1
0.0845
3
1
-2
2
1
0.5
1
0.1035
4
1
-2
2
1
0.5
3
4
1
1
1
Principal objective of the work
KNA
TRC
6/21/2011
1
Solid-liquid equilibrium temperature, K
VISOBS
Liquid
Difference with the reference state, X-X(REF)
Pure solvent at the temperature of the same phase equilibrium
Crystal
1
1
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
Crystal
1
1
Pressure, kPa
Liquid
101
3
1
Mole fraction
4
Liquid
1
0.0063
2
1
-1
2
1
0.5
1
0.0077
2
1
-1
2
1
0.5
1
0.0097
2
1
-1
2
1
0.5
1
0.0131
3
1
-1
2
1
0.5
1
0.0202
3
1
-1
2
1
0.5
1
0.0277
3
1
-1.5
2
1
0.5
1
0.0299
3
1
-1.5
2
1
0.5
1
0.0404
3
1
-2
2
1
0.5
1
0.0517
3
1
-2
2
1
0.5
1
0.062
3
1
-2
2
1
0.5
1
0.0777
3
1
-2
2
1
0.5
1
0.0933
3
1
-2
2
1
0.5
1
0.1038
4
1
-2.5
2
1
0.5
4
5
1
1
1
Principal objective of the work
KNA
TRC
6/21/2011
1
Solid-liquid equilibrium temperature, K
DTA
Liquid
Difference with the reference state, X-X(REF)
Pure solvent at the temperature of the same phase equilibrium
Crystal
1
1
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
Crystal
1
1
Pressure, kPa
Liquid
101
3
1
Mole fraction
5
Liquid
1
0.0102
3
1
-1.71
3
1
0.5
1
0.0251
3
1
-2.26
3
1
0.5
1
0.0501
3
1
-3.14
3
1
0.5
1
0.0999
3
1
-4.16
3
1
0.5
5
6
1
1
1
Principal objective of the work
KNA
TRC
6/21/2011
1
Solid-liquid equilibrium temperature, K
DTA
Liquid
Difference with the reference state, X-X(REF)
Pure solvent at the temperature of the same phase equilibrium
Crystal
1
1
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
Crystal
1
1
Pressure, kPa
Liquid
101
3
1
Mole fraction
6
Liquid
1
0.0101
3
1
-1.37
3
1
0.5
1
0.0255
3
1
-1.58
3
1
0.5
1
0.0501
3
1
-2.31
3
1
0.5
1
0.1001
4
1
-3.79
3
1
0.5