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1,2-Diisopropylbenzene: 1,3-Diisopropylbenzene: 1,4-Diisopropylbenzene Common name o-Diisopropylbenzene: m-Diisopropylbenzene: p-Diisopropylbenzene Chemical structure: CAS Number: 577-55-9: 99-62-7: 100-18-5 PubChem: CID 11345 from PubChem: CID 7450 from PubChem: CID 7486 from PubChem: Chemical formula: C 12 H 18: Molar mass: 162.28 g/mol ...
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] It is the principal industrial precursor to resorcinol via the Hock rearrangement ...
The remaining components are primarily polyisopropyl benzenes. In 1976, an improved cumene process that uses aluminum chloride as a catalyst was developed. The overall conversion of cumene for this process can be as high as 90%. The addition of two equivalents of propylene gives diisopropylbenzene (DIPB).
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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]
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It was invented by R. Ūdris and P. Sergeyev in 1942 (USSR), [1] and independently by Heinrich Hock in 1944. [2] [3] This process converts two relatively cheap starting materials, benzene and propylene, into two more valuable ones, phenol and acetone. Other reactants required are oxygen from air and small amounts of a radical initiator.