diazonium salt

noun

, Chemistry.

1. any of a group of salts of the general formula ArN 2 X, in which Ar represents an aryl group and X an anion, as benzenediazonium chloride, C 6 H 5 N(N)Cl, many of which are important intermediates in the manufacture of azo dyes.

diazonium salt

noun

1. any of a class of compounds with the general formula ArN:N ^–M ⁺, where Ar is an aryl group and M is a metal atom; made by the action of nitrous acid on aromatic amines and used in dyeing

Word History and Origins

Origin of diazonium salt¹

First recorded in 1905–10

Example Sentences

These iso-diazotates are formed much more readily when the aromatic nucleus in the diazonium salt contains negative radicals.

From Project Gutenberg

In this process the amine salt is dissolved in absolute alcohol and diazotized by the addition of amyl nitrite; a crystalline precipitate of the diazonium salt is formed on standing, or on the addition of a small quantity of ether.

From Project Gutenberg

Replacement of -NH2 by -OH:—The amine is diazotized and the aqueous solution of the diazonium salt is heated, nitrogen being eliminated and a phenol formed.

From Project Gutenberg

Oxyazo Compounds.—The oxyazo compounds are prepared by adding a solution of a diazonium salt to a cold slightly alkaline solution of a phenol.

From Project Gutenberg

Zincke found that the products obtained by coupling a diazonium salt with α-naphthol, and by condensing phenyl-hydrazine with α-naphthoquinone, were identical; whilst Meldola acetylated the azophenols, and split the acetyl products by reduction in acid solution, but obtained no satisfactory results.

From Project Gutenberg