IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: 2,3-Dimethylbutane with Water

   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 2,3-Dimethylbutane; C6H14; [79-29-8]  NIST Chemistry WebBook for detail

   M.C. Haulait-Pirson, Department of Chemistry, University of Leuven, Belgium.
G.T. Hefter, School of Mathematical and Physical Sciences, Murdoch University, Perth, W.A., Australia. November 1984.

Critical Evaluation:

   Quantitative solubility data for the system 2,3-dimethylbutane (1) and water (2) have been reported in the publications listed in Table 1.

The original data in all of these publications are compiled in the Data Sheets immediately following this critical Evaluation. For convenience, further discussion of this system will be divided into two parts.


The solubility data for 2,3-dimethylbutane in water (ref 2,3) are listed in Table 2 and plotted in Figure 1 The datum of Krzyzanowska and Szeliga (ref 4) has been excluded from this Evaluation as it does not appear to be independent of that of Price (ref 3).

At 298 K where comparison is possible, agreement between the reported values is only fair. At other temperatures only the values of Price (ref 3) are available. Thus all values are classified as Tentative. It should be noted firstly that the increase in solubility at lower temperatures reported by Polak and Lu (ref 2) is larger than is usually observed in hydrocarbon –water systems (e.g. benzene in water), and secondly the values of Price (ref 3) are usually reliable over the entire temperature range studied.


The reported solubility data for water in 2,3-dimethylbutane (ref 1,2) are listed in Table 3. There are insufficient data to warrant plotting.

Agreement between the values at 273 K is excellent but at 298 K the datum of Englin et al. (ref 1) is about 50% (relative) higher than that of Polak and Lu (ref 2). In well characterized systems (e.g. water in benzene) the data of Englin et al. are generally satisfactory at T < 300 K but are markedly higher than "Recommended" values at higher temperatures. The value of Polak and Lu (ref 2) is therefore preferred at 298 K and at higher temperatures the data of Englin et al. should be regarded only as order of magnitude values.

Experimental Data:   (Notes on the Nomenclature)

Table 1. Quantitative Solubility Studies of the 2, 3-Dimethylbutane (1) - Water (2) System
Englin et al.273-3231(2) in (1)analytical
Polak and Lu273, 2982mutualGLC, Karl Fischer
Price298-4233(1) in (2)GLC
Krzyzanowska and Szeliga2984(1) in (2)GLC
Table 2. Tentative Values for the Solubility of 2, 3-Dimethylbutane (1) in Water (2)
T/KReferenceSol. PowerSolubilitySol. NoteBest Sol. PowerBest SolubilityBest Sol. Notex1 Powerx1x1 Note
273233.29 g(1)/100g slna33.3 g(1)/100g slnb66.9b
2982, 332.25, 1.91 g(1)/100g slna32.1 ± 0.2 g(1)/100g slnb64.4b
303331.9* g(1)/100g slna31.9 g(1)/100g slnb64.0b
313331.9* g(1)/100g slna31.9 g(1)/100g slnb64.0b
323332.1* 103 g(1)/100g slna321 g(1)/100g slnb64.4b
343332.8* g(1)/100g slna32.8 g(1)/100g slnb65.9b
363333.5* g(1)/100g slna33.5 g(1)/100g slnb67.3b
383334.6* g(1)/100g slna34.6 g(1)/100g slnb69.6b
403337.5* g(1)/100g slna37.5 g(1)/100g slnb616b
4233318* g(1)/100g slna318 g(1)/100g slnb638b
Table 3. Recommended (R) and Tentative Values of the Solubility of Water (2) in 2, 3-Dimethylbutane (1)
T/KReferenceSol. PowerSolubilityBest Sol. PowerBest SolubilityBest Sol. Notex2 Powerx2x2 Note
2731, 232.9, 3.0 g(2)/100 g sln33.0 (R) g(2)/100 g sln-41.43 (R)-
283135.8 g(2)/100 g sln35.8 g(2)/100 g sln-42.8-
2931311.0 g(2)/100 g sln311 g(2)/100 g sln-45-
2981, 2315a, 9 g(2)/100 g sln39 g(2)/100 g sln-44-
3031319.2 g(2)/100 g sln320 g(2)/100 g slnb410b
3131332.3 g(2)/100 g sln330 g(2)/100 g slnb414b
3231351.6 g(2)/100 g sln350 g(2)/100 g slnb424b
View Figure 1 for this Evaluation

Table 2a  Values marked with an asterisk ( * ) have been obtained by the Evaluator by graphical interpolation of the original measurements.
Table 2b  Obtained by averaging where appropriate, σn has no statistical significance.
Table 3a  Graphically interpolated by the Evaluator; datum of Polak and Lu (ref 2) preferred, see text.
Table 3b  Order-of-magnitude values only, see text.

References: (Click a link to see its experimental data associated with the reference)

   1  Englin, B.A.; Plate, A.F.; Tugolukov, V.M. Pryanishnikova, M.A., Khim. Tekhnol. Topl. Masel 1965, 10, 42-6.
   2  Polak, J.; Lu, B.C.Y., Can. J. Chem. 1973, 51, 4018-23.
   3  Price, L.C., Am. Assoc. Petrol. Geol. Bull. 1976, 60, 213-44.
   4  Krzyzanowska, T.; Szeliga, J., Nafta (Katowice) 1978, 12, 413-7.