B-Propylbenzene

Potassium hydroxide, alcoholic, 7, 77 Potassium iodide, 4, 37 7, 14, 58 Potassium permanganate, 7, 18 8, 68 Potassium Phthalimide, 7, 8, 78 Potassium sulfate, 6, 2 Prest-o-lite tank, 8, 10 Propane-1, 1, 2, 3-Tetracarboxyuc Ester (Ethyl), 4, 29, 77 b-Propylbenzene, 4, 39 ixo-Propyl chloride, 6, 28 M-Propy chloride, 5, 28... 

The identification of a specific nitrating species can be approached by comparing selectivity with that of nitration under conditions known to involve the nitronium ion. Examination of part B of Table 10.7 shows that the position selectivity exhibited by acetyl nitrate toward toluene and ethylbenzene is not dramatically different from that observed with nitronium ion. The data for i-propylbenzene suggest a lower ortho para ratio for acetyl nitrate nitrations. This could indicate a larger steric factor for nitration by acetyl nitrate. 

Fig. 25. Ion image of photoffagment (a) m/e = 91, (b) m/e = 29, from photodissociation of ro-propylbenzene at 193 nm. The delay times between pump and probe laser pulses are 28 fas and 8 fas, respectively, (c) The translational momentum distributions of m/e = 29 (thin solid line) and 91 (thick solid line), (d) The fragment translational energy distribution for the reaction C6H5C3H7 —> C6H5CH2 + C2H5.

FIGURE 5.11 Gradient-elution reversed-phase separation of alkylbenzenes on a Purospher Star RP-18e, 3 am, column (30x4mm i.d.). (A) Non-adjusted linear gradients, 50%-100% acetonitrile in 3min at ImL/ min and at 3mL/min. (B) Adjusted linear gradients, 50%-100% acetonitrile in 3 min at ImL/min and 50%-100% acetonitrile in Imin at 3mL/min. Conditions 40°C, detection UV, 254 nm sample B—benzene, MB—toluene, EB—ethylbenzene, PB—propylbenzene, BB—butylbenzene, AB—amylbenzene, and HB—hexylbenzene. 

Figure 12 Cross-sections of CA host channels sliced parallel to the direction of the channel (carbon and hydrogen atoms are represented by gray and white, respectively) with arrays of included guest molecules (hydrogen atoms are omitted for clarity, and carbon and oxygen atoms are represented by open and filled circles, respectively), (a) toluene, (b) w-propylbenzene, (c) n-butylbenzene, (d) w-hexylbenzene, (e) p-xylene, and (f) methyl methacrylate.

Fig. 4.4. Electropherograms illustrating the effect of the length of the bare-silica segment on the separation of probe compounds, a) 0 cm, b) 6 cm, and c) 28 cm. Solutes 1, benzene 2, toluene 3, ethylbenzene 4, propylbenzene 5, butylbenzene and 6, pentylbenzene. Reprinted from ref. [56] with permission. Copyright Wiley-VCH 1999.

Fig. 2.8 Diagrams illustrating (a) enantiotropic and (b) monotropic phase relationships for two organic compounds, cw-decahydronaphthalene and n-propylbenzene, respectively. Note that the y scale is actually given in units of entropy calculated from the energy terms. 7), n/i represents the transition point between phases I and II, being above the melting point in (a) and (by extrapolation) below the melting point in (b). (From Westrum and McCullough 1963, with permission.)...

Problem 12.17 Describe simple chemical tests (if any) that would distinguish between (a) w-propylbenzene and i -chlorotoluene (b) benzene and toluene ... 

Figure 13.14. Nmr spectrum of /i-propylbenzene. Moving downheld, we see the expected sequence of signals a, primary (3H) A, secondary (2H) c, benzylic (2H) and d, aromatic (5H). Signals a and c are each split into a triplet by the two secondary protons Hi,. The hve protons adjacent to the secondary protons—three on one side and two on the other—are, of course, not equivalent but the coupling constants, /ab and Jbo are nearly the same, and signal b appears as a sextet (5+1 peaks). The coupling constants are not exactly the same, however, as shown by the broadening of the six peaks.

Propylamine, 574, 576 n-Propylamine, 574, 576 -Propylbenzene, 253, 419 fl-Propyl bromide, 151 n-Propyl n-butyl sulfide, 175 -Propyl chloride, 980 n-Propyl cyanide, 17 1-B-Propylcyclohexene, 775 n-Propylcyclopropane, 202 Propylene, 151, 226, 460... 

The procedure for reducing mixed alkyl aryl ketones is very similar. For instance, propyl-benzene is obtained as follows Propiophenone (25 g) is warmed with amalgamated zinc (100 g) and a mixture of equal parts of water and concentrated hydrochloric acid. A lively reaction sets in after 5 min. Then heating is continued whilst concentrated acid is allowed to drop in during a further 4 h. On working up, 90% (20 g) of propylbenzene, b.p. 155-160°, is obtained. 

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