K-Propylbenzene

The reaction of ethylbenzene with five equivalents of Ic under the same alkylation conditions used for toluene, gives pentakis- (25%), tetrakis- (9%), tris- (4%), and bis[2-(dichloromethylsilyl)ethyl]ethylbenzene (1%) as well as a mixture of many transalkylated products (44%). It is of interest that longer alkyl-substituted benzenes exhibited different behavior in peralkylations with Ic. The transalkylation of ethylbenzene is responsible for the significantly low yield (25%) of peralkylation product in comparison with yields obtained from the alkylation of benzene " or toluene. Peralkylation of K-propylbenzene and K-butylbenzene gives similar results to those of ethylbenzene. 

Dohanyosova, P., Fenclova, D., Vrbka, P., Dohnal, V. (2001) Measurement of aqueous solubility of hydrophobic volatile organic compounds by solute vapor absorption technique toluene, ethylbenzene, propylbenzene, and butylbenzene at temperatures from 273 K to 328 K../. Chem. Eng. Data 46, 1533-1539. 

Al-Kandary, J., Al-Jimaz, A.S., and Abdul-Latif, A.-H.M. Densities, viscosities, and refractive indices of binary mixtures of anisole with benzene, methylbenzene, ethylbenzene, propylbenzene, and butylbenzene at (293.15 and 303.15) K, /. Chem. Eng. Data, 51(1) 99-103, 2006. 

Asmanoca, N. and Goral, M. Vapor pressmes and excess Gibbs energies in binary mrxtmes of hydrocarbons at 313.15 K. 1. Methylcyclohexane-benzene, -toluene, -o-xylene, /rxylene, -ethylbenzene, and -propylbenzene, J. Chem. Eng. Data, 25(3) 159-161, 1980. 

To verify, among the employed mixing rules, the one or ones that best represent the equilibrium data, the C02(l)-Diphenyl(2) at 343.2 K and C02(l)-n-Propylbenzene(2) at 353.2 K systems were used. The data and their conditions are presented in the works of Zang et al. [6] and Maurer et al. [7], respectively. The pure properties of the components are given in Reid et al. [8], The standard deviation of the measured output variable is ap=0.05MPa and cp=0.07MPa, respectively. 

A material such as Na°/NaY catalyzes the aldol condensation of acetone, to form mesityl oxide and eventually isophorone. Another strong base catalyzed reaction is the side chain alkylation of toluene with ethylene. In contrast with acid catalysis, side chain reaction is strongly preferred over ring alkylation. With a Na°/NaX in the gas phase at 473 K, toluene reacts to give n-propylbenzene (66%) and the dialkylated product, 3-phenylpentane (32%) (41). 

A marked contrast is observed in the behaviour of the simplest aromatic hydrocarbon-air mixtures at high pressures. No cool-flame phenomena or an ignition peninsula in the (p-Ta) diagram are observed. These are found only when sufficiently reactive aliphatic side-chains are associated with the aromatic ring. Burgoyne et al. [129] showed this to be the case for n-propylbenzene in a closed vessel (Fig. 6.18). The ortho- and meta-isomers of the xylenes also showed a similar reactivity. Benzene, toluene and ethylbenzene were found to undergo spontaneous ignition at temperatures only above 700 K. 

When [Na (pz )Bpph Me ] reacts with Co(NCS)2, [Co(NCS) (pz )-Bpph Me (THF)]-THF is formed. Heating these cobalt complexes at 428 K in propylbenzene resulted in a borotropic shift of pzP6 Me moiety and subsequent formation of the chiral... 

Reactions of toluene, ethylbenzene, and w-propylbenzene with ions having recombination energies ranging from 9.26 eV (NO ) to 15.58 eV (NJ) were studied at 300 K in a selected ion flow tube (SIFT) yielding information regarding the role of electronic energy in these reactions. These... 

Cumene conversion under excess of benzene was studied over H-ZSM-11 in the adsorbed phase at 473 K by in situ C MASNMR. To follow the fate of different carbon atoms during the reaction, cumenes labelled with C-isotopes either on a-or on p-positions of the alkyl chain or in the aromatic ring have been synthesized. The primary product of cumene conversion over H-ZSM-11 was found to be n-propylbenzene. It is formed via intermolecular reaction of cumene and benzene. At long reaction times, the formation of n-propylbenzene is accompanied by complete scrambling of both cumene and n-propylbenzene alkyl chain carbon atoms and formation of toluene, ethylbenzene and butylbenzene. The rate of isomerization is higher than the rate of scrambling and fragmentation. 

Quantum-chemical calculations by the method of Hartrii-Focks with parameters UHF and RHF 4-replaced 2,6-di-ferf.butylphenol values energy homolytic dissociation 0-H of communications - D jj are found Value energy formation and energy of homolytic cleavage D communications in molecules phenols depend on calculation approach M6 or PM3) and parameters of a method of Hartrii-Focks. There are dependences D from k reactions 4-substituted investigated 2,6-di-fert.butylphenol with iso-propylbenzene peroxide compound. Results of calculations D (Q of sterically hindered phenols in approach PM6 with parameter RHF are corrected to experimental data. 

In the present work approaching s PM3 and PM6 and operators of Hartrii-Focks in the conditions of the decision of the template equations the unlimited and circumscribed method in the program Mopac2009 [6] used. In the conditions of the initiated oxidation at 50°C defined constants of speeds of reactions peroxy radical z5o-propylbenzene with 4-Z-replased -2,6-di-ferf.butylphenols. Results of the analysis of dependences of calculations D from k have allowed to recommend approach PM6 with operators RHF for calculation D (OH)Of sterically hindered phenols. 

Reaction constants peroxy radical of wo-propylbenzene with 4-Z-re-plased -2,6-di-fert.butylphenols (k ) defined in conditions inhibiting oxidations /50-propylbenzene by oxygen at 50°C in presence azodiisobutyro-nitrile. 

Coral, M. Asmanova, N. Vapour-hquid equihbriain nonpolar mixtures. Part I. 2,2,4-Trimethylpentane with benzene, toluene, o-xylene, p-xylene, ethylbenzene and propylbenzene at 313.15 K Fluid Phase Equilib. 1993,86, 201-209... 

Dragoescu, D. Barhala, A. Vilcu, R. Isothermal vapor-liquid equilibria in binary mixtures of cyclohexane + propylbenzene by static total pressure method at temperatures from 303.15 K to 323.15 K ELDATA Int. Electron. J. Phys.-Chem. Data 1997, i, 85-90... 

A 100% methanol mobile phase was used in the study of the retention characteristics for over 50 alkyl-substituted benzenes on a porous graphite column [109]. Retention times varied from 1.8 min k = 0.2) for benzene (just slightly more than the void volume) to 58 min (k = 3 7) for pentamethylbenzene. A distinct advantage of this system over a normal Cjg system was the enhanced selectivity of the graphite column towards both isomeric forms as well as methyl and methylene homo logs. The k values and retention times for all analytes are tabulated. The retention differences between polymethylbenzenes and alkyl-substituted benzenes of the same carbon number (e.g., trimethylbenzenes vs. n-propylbenzene) were studied in detail on Cjg and phenyl columns using an 80/20 methanol/water mobile phase. 

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