Diazotization

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diazotization

[dī‚az·ət·ə′zā·shən]
(organic chemistry)
Reaction between a primary aromatic amine and nitrous acid to give a diazo compound. Also known as diazo process.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Diazotization

 

the reaction of preparing diazo compounds by the action of nitrous acid (or its derivatives) on primary amines in the presence of inorganic acids (HCl, H2SO4, or HNO3) at 0°-5°C. The diazotization of aromatic amines to yield diazonium salts is the most common—for example, aniline is diazotized to phenyldiazonium chloride:

In organic synthesis, diazotization is used extensively to make various aromatic compounds through the diazonium salt, as well as to synthesize dyes, particularly azo dyes.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.