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Three isomers exist: 1,2- 1,3-, and 1,4-diisopropylbenzene. All are colorless liquids, immiscible in water, with similar boiling points. They are classified are aromatic hydrocarbons bearing a pair of isopropyl (CH(CH 3) 2) substituents. [1] DIPB has been referred to as "a common diluent" alongside hexane. [2]
1,3-Diisopropylbenzene is an aromatic hydrocarbon with the formula C 6 H 4 (CHMe 2) 2 (Me = CH 3). It is one of three isomeric diisopropylbenzenes . This colorless liquid is prepared by thermal isomerization of 1,4-diisopropylbenzene over a solid acid catalyst. [ 1 ]
1,3-Diisopropylbenzene is produced via transalkylation, a special form of Friedel–Crafts alkylation. It also allows alkyl chains to be added reversibly as protecting groups. This approach is used industrially in the synthesis of 4,4'-biphenol via the oxidative coupling and subsequent dealkylation of 2,6-di-tert-butylphenol. [11] [12]
Cumene (isopropylbenzene) is an organic compound that contains a benzene ring with an isopropyl substituent.It is a constituent of crude oil and refined fuels. It is a flammable colorless liquid that has a boiling point of 152 °C.
Many variations of this reaction have been developed, e.g. use of diisopropylbenzene as a substrate. the autoxidation of cyclohexane yields cyclohexanol and cyclohexanone. [20] p-xylene undergoes auoxidation to terephthalic acid. ethylbenzene is oxidized to ethylbenzene hydroperoxide, an epoxidizing agent in the propylene oxide/styrene process POSM
Transalkylation in conjunction with the Hock rearrangement contributes to the production of 1,3-diisopropylbenzene, a precursor to resorcinol. [8] 1,3-Diisopropylbenzene is produced via transalkylation.
First stage of Hock process: alkylation of benzene with propylene. Second stage of Hock process: autoxidation of cumene. The cumene process (cumene-phenol process, Hock process) is an industrial process for synthesizing phenol and acetone from benzene and propylene.
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