IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Nitromethane with 1-Heptanol

   (1) Nitromethane; CH3NO2; [75-52-5]  NIST Chemistry WebBook for detail
   (2) 1-Heptanol; C7H16O; [111-70-6]  NIST Chemistry WebBook for detail

   V. P. Sazonov, Technical University, Samara, Russia; A. Skrzecz, Institute of Physical Chemistry Polish Academy of Sciences, Warsaw, Poland August 1999.

Critical Evaluation:

    Solubilities in the system comprising nitromethane and 1-heptanol have been reported in two publications. Quinn and Smyth1 determined the solubility of nitromethane in 1-heptanol at 294 K. Sazonov2 measured the mutual solubilities of components (1) and (2) between 288 and 317 K by the synthetic method.
The UCST = 316.1 K and critical solution composition xc1 = 0.686 (Ref. 2) may be treated as tentative. They are consistent with the values calculated from the respective relationships in the nitromethane - alcohol series, discussed at the beginning of this volume (the calculated values are: UCST = 315.8 K and xc1 = 0.685). The experimental data reported in Refs 1 and 2 have been approximated (with the same weighing factor) 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 = 0.92371, a2= -0.06818, b1 = 6.95467, b2 = -6.27250

(mean standard error of estimate was 0.0198).

For approximation xc1 and UCST from Ref. 2 have been used. In the opinion of the evaluators, the smoothed mutual solubilities, calculated by this equation, may be treated as tentative. The results of calculations for the selected temperatures are presented in Table 1. This relationship together with experimental points1,2 are also presented in Fig. 26 .

Experimental Data:   (Notes on the Nomenclature)

TABLE 1. Mutual solubility of nitromethane and 1-heptanol
T/K102 * Mass Fraction w1Mole Fraction x1Comment(s)
288.29.730.1703Alcohol-rich phase
288.296.860.9833Nitromethane-rich phase
293.211.710.2016Alcohol-rich phase
293.293.550.9650Nitromethane-rich phase phase phase
303.217.540.2882Alcohol-rich phase
303.286.390.9235Nitromethane-rich phase
308.222.300.3534Alcohol-rich phase
308.281.870.8958Nitromethane-rich phase
313.230.700.4574Alcohol-rich phase
313.274.760.8493Nitromethane-rich phase
314.233.620.4909Alcohol-rich phase
314.272.290.8324Nitromethane-rich phase
315.237.960.5380Alcohol-rich phase
315.268.510.8055Nitromethane-rich phase
315.741.610.5757Alcohol-rich phase
315.765.180.7808Nitromethane-rich phase
View Figure 26 for this Evaluation

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

   1  Quinn, R.G.; Smyth, C.P., J. Chem. Phys. 41, 2037-41 (1964).
   2  Sazonov, V.P., Zh. Obshch. Khim. 59, 2431-5 (1989).