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The halogenation of aromatics: Part VIII. Transbromination of toluene and chlorobenzene with bromobenzene under the influence of aluminium bromide-[82 Br]

✍ Scribed by R. Louw; E. C. Kooyman

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 220 KB
Volume: 82
Category: Article
ISSN: 0165-0513
DOI: 10.1002/recl.19630820611

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✦ Synopsis

Abstract

Transbromination of chlorobenzene and of toluene with bromobenzene under the influence of aluminium bromide‐[^82^ Br] is accompanied by some bromine exchange between organic and inorganic bromides. However, since many bromine atoms are transferred for every bromine atom exchanging with the catalyst, the bromine atoms present in the brominating species (e.g. Br⊕Al~2~Br~7~⊖) are not in a state of rapid equilibration. The ratio of transfer and exchange is appreciably greater for toluene than for chlorobenzene as the acceptor.

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The halogenation of aromatics: Part VII.

The halogenation of aromatics: Part VII. Isomerizations, disproportionations and transbrominations involving bromobenzenes in the presence of aluminium bromide

✍ E. C. Kooyman; R. Louw 📂 Article 📅 2010 🏛 Elsevier Science 🌐 English ⚖ 660 KB

## Abstract The dibromobenzenes isomerize under the influence of aluminium bromide at room temperature to form an equilibrium mixture of dibromo compounds (60 % __meta__, 35 % __para__, 5 % __ortho__), bromobenzene and tribromobenzenes. __p__‐Dibromobenzene first forms __ortho__‐isomer, __meta__‐is