Solubilities in the system comprising nitromethane and 3-methyl-1-butene have been reported in two publications. Burova et al.¹ studied the mutual solubilities of the components between 292 K and 326 K by the synthetic method. Riccardi et al.² carried out measurements of the mutual solubilities of (1) and (2) between 310 K and 325 K, also using the synthetic method.

The experimental data reported in Burova et al.¹ and Riccardi et al.² differed significantly in the region close to the UCST. Solubility data of various other systems reported by Riccardi and co-workers were very close to the recommended/tentative values so only these data 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 = 0.74092, a₂ = 0.19947, b₁ = 5.26510, b₂ = -4.02929

(mean standard error of estimate was 0.0258).

The UCST = 324.5 K and x_c1 = 0.520, reported in Riccardi et al.,² may be treated as tentative and these values have been used also for approximation. 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 all experimental points^1,2 are also presented in Fig. 9 .