Pentane, reaction

The apparatus for the preparation of n-butyllithium - consists of a three-necked flask fitted with a mercury-sealed stirrer, a dropping fuimel, and a reflux condenser. The apparatus is assembled hot, and air is immediately displaced by a stream of dry nitrogen which enters through the condenser. A solution of 37 ml. (0.35 mol) of n-butyl chloride in 50 ml. of n-pentane is added slowly (about one drop per second) to small pieces of lithium wire (5.0 g. 0.71 mol) suspended in 80 ml. of 71-pentane. Reaction begins after a short induction period (about 10 minutes), producing a... 

Figure 4 shows the relative catalytic activity on commercially coked catalyst sampled during the commercial cycle for n-pentane reactions as a function of the... 

Fig. 4 (left). Relative catalytic activity for the n-pentane reactions at 500 C on commercially coked catalysts as a function of carbon content. A, isomerization. , hydrocracking. , dehydrocyclization. o hydrogenolysis... 

Gibbs energy contours for the pentane reactions as a function of the two reaction extents... > 95... 

The cucumber flavor volatiles have also been shown to occur with the same rapidity under similar conditions (36,3l2) Pentane is produced 2-3 minutes after peanuts have been homogenized for for 1-min. Because the pentane reaction is delayed, the sample may be homogenized in an O2 atmosphere and then acidified to prevent the hydroperoxides from producing pentane. Hexanal production cannot be prevented in this matter. 

I. Ibrahem, G. L. Zhao, R. Rios, J. Vesely, H. Sunden, P. Dziedzic, A. Cdrdova, Chem.-Eur. J. 2008, 14, 7867-7879. One-pot organocatalytic domino Michael/a-alkylation reactions direct catalytic enantioselective cyclopropanation and cyclo-pentanation reactions. 

Figure IV-B-8. Arrhenius plot for the rate coefficients for the OH + pentanal reaction. 

---