What is "diazonium compound"

n. (context chemistry English) any compound having the general formula R-N₂⁺ X^-, especially one in which R is an aryl residue; they are important as intermediates in the production of azo dyes

Diazonium compounds or diazonium salts are a group of organic compounds sharing a common functional group where R can be any organic group, such as an alkyl or an aryl, and X is an inorganic or organic anion, such as a halogen. Diazonium salts, especially those where R is an aryl group, are important intermediates in the organic synthesis of azo dyes.