Cyclohexyl acetate, decomposition

The influence of the heteroatom on the acid strength is shown, for example, in Fig. 28. Here the rates of alkylation of 1,3,5-trimethylbenzene and the decomposition of cyclohexyl acetate catalyzed by the acid forms of several 12-tungstates are plotted against the negative charge of polyanion for solid heteropolyacids (63, 183). The catalytic activities correlate well with the acid strength in solution (Fig. 14). This correlation indicates that the acid strength of... 

Fig. 28. Catalytic activities (per surface proton) as a function of the negative charge of polyanion, XW12O40. (O) Alkylation of 1,3,5-trimethyIbenzene with cyclohexene ( ) decomposition of cyclohexyl acetate. (From Ref. 183.)...

As described in Section II, the pore size of the acidic Cs salts can be controlled by the Cs content. CS2.2H0.8PW12O40 (Cs2.2) has pores having an effective size of 6.2-7.5 A, and the pore size of Cs2.5 is larger than 8.5 A. Figure 30 shows the catalytic activities of Cs2.1 (the pore size is less than 5.9 A) and Cs2.2 for each reaction relative to the activity of Cs2.5 (48). Cs2.5 catalyzed all the reactions with considerable activities (the reaction rates are shown in parentheses in Fig. 30). On the other hand, although Cs2.2 was found to be as active as Cs2.5 for dehydration of 2-hexanol (molecular size, 5.0 A) and decomposition of isopropyl acetate (molecular size, 5.0 A), it was much less active for the decomposition of cyclohexyl acetate (molecular size, 6.0 A) and alkylation of 1,3,5-trimethylbenzene (molecular size, 7.5 A). Therefore, Cs2.2 is... 

D/chloro-5-Cyclohexyl-2-Oxo-2,3-D/hydro 1 H-Benzo(fj-Diazepine-1,4 fa) Process Using Sodium Hypochlorite — 40 ml of a solution of sodium hypochlorite of 14.5 British chloro-metric degrees are added to a suspension of 5.4 grams of 7 chloro-5 cyclohexyl-2 oxo-2,3-dihydro 1 H-benzo(f)diazepine-1,4 in BO ml of methylene chloride. The mixture is stirred at room temperature for 15 minutes the solid dissolves rapidly. The organic iayer is decanted, washed with water, dried over anhydrous Sodium sulfate and the solvent evaporated under reduced pressure without exceeding a temperature of 30 C. The residue is taken up in a little diisopropyl ether and the crystals which form are dried. They are recrystallized as rapidly as possible from ethyl acetate. Colorless crystals are obtained (3.9 grams yield, B5%) MP < = 163°C, with decomposition. 

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