Nitromethane with 2-Methylbutane (IUPAC SDS Volume 71)
Evaluators
Adam Skrzecz Institute of Physical Chemistry, Polish Academy of Sciences
Valerii P. Sazonov Department of Physics, Technical University
Evaluation
Solubilities in the system comprising nitromethane and 2-methylbutane have been reported in three publications. Burova et al.1 studied mutual solubilities of the components between 293 and 341 K, Rolla et al.2 between 350 and 369 K, and Pavlov et al.3 between 293 and 339 K, all using the synthetic method.

All experimental values reported in Burova et al.,1 Rolla et al.,2 and Pavlov et al.3 (treated with the same weighing factor) have been approximated by the equation based on scaling law (described in the Introduction material to this volume "Relations of Solubility Data in Binary Systems Containing Nitromethane") and the following parameters have been adjusted:

a1 = 0.98413, a2 = -0.43533, b1 = 1.13295, b2 = -1.10745

(mean standard error of estimate was 0.0177).

For approximation xc1 and UCST from Rolla et al.2 have been used. In the opinion of the evaluators, the mutual solubilities calculated by this equation may be treated as tentative. The results of calculations for the selected temperatures are presented in the following table. This relationship together with experimental points reported in Burova et al.,1 Rolla et al.,2 and Pavlov et al.3 are also presented in Fig. 10 .

Mutual solubility of nitromethane and 2-methylbutane
C $T$ ($\pu{K}$) D 100w1 D $x_{1}$
293.2 4.01 3.41 x 10-2
293.2 97.43 9.697 x 10-1
298.2 4.84 4.12 x 10-2
298.2 96.92 9.638 x 10-1
303.2 5.74 4.90 x 10-2
303.2 96.38 9.575 x 10-1
313.2 7.81 6.69 x 10-2
313.2 95.16 9.433 x 10-1
323.2 10.33 8.88 x 10-2
323.2 93.71 9.264 x 10-1
333.2 13.45 1.162 x 10-1
333.2 91.9 9.056 x 10-1
343.2 17.48 1.519 x 10-1
343.2 89.54 8.786 x 10-1
353.2 23.06 2.023 x 10-1
353.2 86.13 8.401 x 10-1
363.2 32.42 2.887 x 10-1
363.2 79.93 7.711 x 10-1
368.2 43.38 3.933 x 10-1
368.2 71.59 6.807 x 10-1
369.2 50.64 4.647 x 10-1
369.2 65.29 6.141 x 10-1

Figure
Solubility graph
Sources:

1 Burova, T. V.; Kogan, V. B.; Nemtsev, M. S.; Zh. Prikl. Khim. 36, 988-94 (1963).
2 Rolla, M.; Franzosini, P.; Riccardi, R. L.; Bottelli, L.; Z. Naturforsch. A 22, 48-53 (1967).
3 Pavlov, S. Yu.; Pavlova, S. P.; Serafimov, L. A.; Kofman, L. S.; Izv. Vyssh. Uchebn. Zaved.; Khim. Khim. Tekhnol.; 10, 915-20 (1967).