Iso propyl benzene

Propyl and Iso-propyl Benzenes.—In addition to the three trimethyl benzenes we still have three isomeric hydrocarbons of the composition C9H12. These compounds are isomeric, depending on the substitution in benzene of other radicals than methyl. Substitution of one propyl radical for one benzene hydrogen atom gives us a compound of the same composition as that obtained by substituting three methyl radicals for three hydrogen atoms. As the propyl radical has two isomeric forms, viz., that of normal propyl and that of isopropyl, so we have the two substitution products, propyl benzene, CeHs—CHa—... 

Cymene. i-Methyl 4-Iso-propyl Benzene.—Cymene, the only other isomeric hydrocarbon of the composition C10H14, which we shall consider, is shown to be i-methyl 4-iso-propyl benzene, by its synthesis from para-brom toluene and isopropyl bromide. 

Only two of the higher homologous mono-hydroxy phenols will be mentioned. These are the two isomeric mono-hydroxy cymenes, cymene being i-methyl 4-iso-propyl benzene. They are as follows ... 

The proofs for the above constitutions are as follows (i) Thymol yields cymene, i-methyl 4-iso-propyl benzene, by loss of the hydroxyl oxygen by means of phosphorus penta-sulphide. (2) Carvacrol may be synthesized from potassium cymene sulphonate by fusion with potassium hydroxide. Therefore both must be mono-hydroxy cymenes. (3) Thymol by means of phosphorus pentoxide splits off the iso-propyl radical yielding meta-cresol and propylene. (4) Carvacrol by the same reaction yields ortho-cresol. Therefore in thymol the hydroxy group is meta to the methyl group while in carvacrol it is ortho. The following relationships are thus established. 

Cuminic Aldehyde.—Only two of the higher aldehydes are of sufficient importance to require mention, viz., cuminic aldehyde and cinnamic aldehyde. The first is the aldehyde of iso-propyl benzene with the aldehyde group in the para position. 

HaC CH, Cymene C10H14 I-Methyl 4-iso- -propyl benzene CH3 1 CH H3C CH3 Di-hydro cymene C10H16 Terpa-di-ene Mentha-di-ene CH3 1 CH... 

Cresol(s) Ethylene glycol iso-Propyl benzene Xylene(s)... 

The mechanism of considerably-chain oxidation of hydrocarbons is known and based on kinetics of unit steps [2]. In practice of research of laws use the initiated oxidation with constant speed of formation alkyl radicals. At the initiated oxidation of iso-propyl benzene (ArH) at presence azodiiso-... 

Al-Khattafa S, Atiasb JA, Jaroschc K, de Lasa H. Diffusion and catalytic cracking of 1,3,5 tri-iso-propyl-benzene in FCC catalysts. Chem Eng Sci 2002 57 4909-20. 

Benzene Bromomethane 2-Butanone 2-Butoxyethanol Carbon disulfide 2-Chloroethanol Chloromethane Cresol(s) Cyclohexanol Cyclohexanone Dimethylformanude Dimethylsulfoxide 1,4-Dioxane 2-Ethoxyethanol Ethylbenzene Ethyl formate Ethylene glycol n-Hexane 2-Hexanone Methanol 2-Methoxyethanol Methyl formate Nitrobenzene Nitrotoluene(s) Phenol iso-Propyl benzene n-Propanol (ftom ACGIH) 1.1.2.2- Tetrachloroethane Tetrachloroethene Tetrachloromethane Toluene Toluidine(s) 1.1.2- Trichloroethane Trichloromethane Xylene(s)... 

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