Quantitative solubility data for the system nitromethane + 1-tridecanol have been reported in the publications listed in Table 1.Apart from the publication Schmid et al.,1 which did not contain sufficient information to justify its inclusion, all the original data are given in the data sheets following this Critical Evaluation. In the tables which follow, values obtained by the evaluators by graphical interpolation or extrapolation from the data sheets are indicated by an asterisk (*). "Best" values have been obtained by simple averaging. The uncertainty limits (σn) attached to these "best" values do not have statistical significance and should be regarded only as a convenient representation of the spread of the values and not as error limits.
The data in Tables 2 and 3 are generally in good agreement. However, as they have all been obtained by the same group they cannot be considered fully independent and thus must be classified as tentative only, pending future independent studies.
The upper critical solution temperature has been reported as 342.7 K,3 343.2 K, 1344.5 K,4 and 344.7 K.2 As the UCST values of Schmid et al.1 in well characterized systems are generally lower than other reports it is possible that all of these values are somewhat low. From the relationship of UCST in the nitromethane - alcohol series, discussed at the beginning of this volume, the nitromethane - 1-tridecanol UCST calculated value is 345.5 K.
The corresponding critical solution composition has been reported as xc1 = 0.796,4 xc1 = 0.807,2 and xc1 = 0.8123 , while the value calculated on the basis of similar relationship in the series was equal 0.818 has a small uncertainty but, in view of the comments above, it seems best to regard this value as tentative only at this stage. These calculated UCST and critical solution composition values, consistent in the series, are recommended and they have been used for approximation of model parameters. The "best" values for the mutual solubility reported in the above tables have been approximated by the equation based on scaling law (described in the introduction to this volume) and the following parameters have been adjusted:
a1 = 0.62409, a2 = 0.61947, b1 = 5.33451, and b2 = -5.78292(mean standard error of estimate was 0.0037).
This relationship is presented in Fig. 32 together with experimental data reported in Zhuravleva et al.2,3,4 Monotectic equilibrium2,3 has been reported to occur at 301.2 K.