Neohexane

It is both interesting and important to note that, judged from the behavior of neohexane, hydrogenolysis over platinum, in contrast to nickel, strongly favors rupture of C—CqUart bonds. The mechanistic implications of this will be discussed subsequently. 

Fig. 12.4. Vapor-to-water transfer data for saturated hydrocarbons as a function of accessible surface area, from [131]. Standard states are 1M ideal gas and solution phases. Linear alkanes (small dots) are labeled by the number of carbons. Cyclic compounds (large dots) are a = cyclooctane, b = cycloheptane, c = cyclopentane, d = cyclohexane, e = methylcyclopentane, f = methylcyclohexane, g = cA-l,2-dimethylcyclohexane. Branched compounds (circles) are h = isobutane, i = neopentane, j = isopentane, k = neohexane, 1 = isohexane, m = 3-methylpentane, n = 2,4-dimethylpentane, o = isooctane, p = 2,2,5-tri-metbylhexane. Adapted with permission from [74], Copyright 1994, American Chemical Society...

Figure 10.1a shows electron drift velocity as a function of electric field in methane, NP, and TMS (sublinear cases) according to the data of Schmidt and co-workers. These are contrasted in Figure 10.1b with supralinear drift velocity in neohexane, ethane, 2,2,2,4-TMP, and butane at the indicated temperatures In the case of neohexane, the drift velocity has been found to be proportional to the field up to 140 KV/cm (Bakale and Schmidt, 1973b). 

Neel point, 27 38—46, 49 Neighboring atoms, effect in X-ray absorption spectroscopy, 35 22-23 Neodymia, conversion rates, 27 37 Neohexane... 

Figure 3. Solubility data of neohexane (NH), methylcyclohexane (MCH), and tert-butyl methyl ether (MTBE) in water. The upper figure is the vapor-liquid-liquid equilibria at 275.5K and the lower figure is the liquid-liquid equilibria at atmospheric pressure. (Reprinted from Fluid Phase Equilibria (Susilo et al., 2005), Copy right (2005) with permission from Elsevier).

Susilo, R. Lee, J.D. Englezos, P. (2005). Liquid-liquid equilibrium data of water with neohexane, methylcyclohexane, tert-butyl methyl ether, n-heptane and vapor-liquid-liquid equilibrium with methane. Fluid Phase Equilibria, 231, 20-26. 

Although acetone is used widely as an industrial solvent, nevertheless it has become the by-product of the acetone-butanol fermentation and there is always the fear of overproduction. There is thus a need for an extension of the industrial utilization of acetone. A possibility in this direction may be in its conversion into pinacol, the preparation of which has recently been improved by McHenry, Drum and O Connor. It is obtained together with isopropyl alcohol by electrolytic reduction of acetone under controlled conditions. Pinacol (LXVI) may be dehydrated to 2,3-dimethylbutadiene which can be converted into a synthetic rubber, or converted through pinacolone (LXVII) into neohexane... 

Figure 16 Variation of kjk-o with in condensed nonpolar media [99,100,112]. Neopentane, liquid (A) and solid (A) neohexane (t) TMS (V) w-pentane, w-hexane ( + ) w-hexane, cyclohexane ( ) neopentane-w-hexane mixtures (x) methane, liquid ( ) and solid ( ) and argon, liquid (O) and solid...

The study of archetype molecules. This method has been proposed and widely used by Rooney, Burwell, Anderson, and others (see, for review, 155,156,160). In this method a molecule is used which can form an archetype of chemisorbed complex ( caged molecules as derivatives of ada-mantane or ethane in its hydrogenolysis, neopentane in exchange with D2 or in reforming reactions, etc.) or which can form several complexes, but the contribution of these complexes to the overall mechanism is easily derived from the product spectrum [as is the case, for example, with neohexane (167, 168). ... 

Fig. 4. 3C complexes, the existence of which can be seen in experimental evidence from exchange [neopentane Rh (Pt)] and from hydrogenolysis and isomerization (neopentane, neohexane). As in Fig. 3, the known ( ) and the speculative aspects ( ) of the 3C complex formation are indicated. 

Results on reactions of neohexane and neopentane confirmed that Pt and, to a less extent, Pd are able to form 3Cay-type complexes rather than the... 

Fig. 14. Product patterns as a function of temperature in neohexane/H2 reactions (a) Pure Ni measured at low temperatures (b) pure Ni diluted by Si02 and self-poisoned by the running reactions (notice that methane > neopentane, i.e., multiple reactions are also running at the lowest conversions) (c) alloy of Ni/Cu in the ratio 65 35 (increase in methane < decrease in neopentane this indicates that molecules other than methane are formed, i.e., the role of ay is larger here). From V. Ponec el at., Faraday Discuss. No. 72, p. 33.

Fig. 15. Selectivity for nondestructive reactions in hexane (HEX) and neohexane (NEOHex) reactions (in H2) in the temperature range 173-603 K. From V. Ponec et ai, Faraday Discuss. No. 72, p. 33.

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