Methylcyclopentane, solubility

The nucleophilic nature of the alkanes is also shown by the influence of the acidity level on their solubility. Torek and co-workers90 have investigated the composition of the catalytic phase obtained when w-pentane or w-hexane is thoroughly mixed with HF-SbF5 in an autoclave under hydrogen pressure [Eq. (5.41)]. The total amount of hydrocarbon in the catalytic phase (dissolved ions and neutrals) was obtained by extraction with excess of methylcyclopentane. The amount of physically dissolved... 

The concentration of methylcyclopentane In the acid depends strongly on the modifier. Figure 5. The data were obtained by Infrared analyses of CCI4 extracts of saturated solutions of methylcyclopentane In H2SO4 after standing 24 hours. There Is clearly no simple relationship between the solubility of methylcyclopentane and the relative hydride transfer rates. 2% Methanesulfonlc acid for example. Increases the solubility about 10-fold but yields only a slight rate Increase. 

Figure 7.4 Effect of temperature on solubility for the system n-hexane (A)-aniline (B)-methylcyclopentane (C).

Figure 34 presents a schematic compilation of the p T) diagrams for the binary CH4 systems given in Figure 31. Type 3 in Figure 34d corresponds to the CH4 + methylcyclopentane system already discussed. For a binary system with even lower mutual solubility, the critical curve will be displaced to higher temperatures and it may be possible that the critical curve no longer disappears below... 

Figure 11.1 shows the most common behavior for partly soluble ternary mixtures (called type I). Figure 11.6, for n-hexane, methylcyclopentane, and analine, shows the next most common type (called type II) at 25°C. Two of the three binary mixtures form two liquid phases, so that the two-phase region touches two of the edges of the triangle. At 34.5 °C the methylcyclopentane-analine binary is at its UCST (the same as 125°C in Figure 11.3). At that temperature the two-phase region has shrunk, compared to its size at 25°C, and its plait point barely touches the M-A edge. At 45°C the two-phase region has shrunk even further and only...

FIGURE 11.6 Effect of temperature on solubility for the system n-hexane (H), methylcyclopentane (M), and analine (A). Increasing the temperature reduces the size of the two-phase region. (From Sender, J. D., and E. J. Henley. Separation Process Principles. 1998, New York Wiley, p. 438. Reprinted by permission of John Wiley Sons, Inc.)... 

---