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Electrophilic halogenation
In organic chemistry electrophilic halogenation is a type of halogenation. This chemical reaction is typical of aromatic compounds. This type of halogenation is a very useful method for adding substituents to an aromatic system.
An example is the chlorination of benzene:
Overall: C6H6 + Cl2 → C6H5Cl + HCl
A few types of aromatic compounds, such as phenol, will react without a catalyst, but for typical benzene derivatives with less reactive substrates, a Lewis acid catalyst is required.
Typical Lewis acid catalysts include AlCl3, FeCl3, FeBr3, and ZnCl2. These work by forming a highly electrophilic complex which attacks the benzene ring.
Last updated: 05-28-2005 19:13:43
03-10-2013 05:06:04
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details