IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Methylcyclopentane with Water

Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) Methylcyclopentane; C6H12; [96-37-7]  NIST Chemistry WebBook for detail

Evaluator:
   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 methylcyclopentane (1) – 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.

1. THE SOLUBILITY OF METHYCYCLOPENTANE (1) IN WATER (2)

The solubility data for methylcyclopentane in water at 298K are listed in Table 2. The datum of Krzyzanowska and Szeliga (ref 5) has been excluded from consideration as it does not appear to be independent of that of Price (ref 4). The high temperature data of Guseva and Parnov (ref 1) presumably made in sealed tubes are rejected because of inadequate specification of system conditions (especially pressure). All other data are given in Table 2.

2. THE SOLUBILITY OF WATER (2) IN METHYLCYCLOPENTANE (1)

The solubility of water in methylcyclopentane has been reported in only one publication: Englin et al. (ref 2), and thus no Critical Evaluation can be given. However, it should be noted that in well characterized systems (e.g. benzene-water), the data of Englin et al. are generally reliable at lower temperatures but are higher than “Recommended” values when T > 300K. The interested user is referred to the appropriate data sheet for the original values.

Experimental Data:   (Notes on the Nomenclature)

Table 1. Quantitative Solubility Studies of the Methylcyclopentane (1) - Water (2) System
Author	T/K	Reference	Solubility	Method
Guseva and Parnov	335-487	1	(1) in (2)	synthetic?
Englin et al.	283-303	2	(2) in (1)	analytical
McAuliffe	298	3	(1) in (2)	GLC
Price	298	4	(1) in (2)	GLC
Krzyzanowska and Szeliga	298	5	(1) in (2)	GLC
Rudakov and Lutsyk	298	6	(1) in (2)	partition coefficient

Table 2. Recommended Value of the Solubility of Methylcyclopentane (1) in Water (2)
T/K	Reference	Sol. Power	Solubility	Best Sol. Power	Best Solubility	Best Sol. Note	x₁ Power	x₁	x₁ Note
298	3, 4, 6	3	4.2, 4.18, 4.5 g(1)/100g sln	3	4.3 ± 0.1 g(1)/100g sln	a	6	9.2	a

Notes:
Table 2^a  Obtained by averaging, σ_n has no statistical significance.

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

   1  Guseva, A.N.; Parnov, E.I., Vestn. Mosk. Univ. Khim. 1964, 19, 77-8.
   2  Englin, B.A.; Plate, A.F.; Tugolukov, V.M. Pryanishnikova, M.A., Khim. Tekhnol. Topl. Masel 1965, 10, 42-6.
   3  McAuliffe, C., J. Phys. Chem. 1966, 70, 1267-75.
   4  Price, L.C., Am. Assoc. Petrol. Geol. Bull. 1976, 60, 213-44.
   5  Krzyzanowska, T.; Szeliga, J., Nafta (Katowice) 1978, 12, 413-7.
   6  Rudakov, E.S.; Lutsyk, A.I., Zh. Fiz. Khim. 1979, 53, 1298-1300.