Preparation of Diazonium Salt
At 273–278K, aniline reacts with nitrous acid to generate benzene diazonium chloride. When sodium nitrite reacts with hydrochloric acid, nitrous acid is formed in the reaction mixture. The process of diazotisation is the transformation of primary aromatic amines into diazonium ions. Due to its volatility, the diazonium salt is seldom kept and is used immediately after production.
NaNO2 + HCl → HNO2 + NaCl
HNO2 + HNO2 → N+=O + H2O + NO2–
Diazonium Salts – Definition, Preparation, Properties, Importance
Diazonium salts are a class of organic compounds containing the diazonium functional group (-N2+X–), where X is an anion such as chloride (Cl–), tetrafluoroborate (BF4–), or sulfate (SO42-). These compounds are characterized by the presence of a positively charged nitrogen atom (N+) bound to two other atoms or groups. Diazonium salts are used in the synthesis of azo dyes and pigments. Azo dyes are extensively used in the textile, printing, and coloring industries due to their vibrant colors.
In this article, we will learn in detail about diazonium salts, its nomenclature, preparation, properties and importance.
Table of Content
- What are Diazonium Salts?
- Preparation of Diazonium Salt
- Physical Properties of Diazonium Salts
- Chemical Reactions of Diazonium Salts
- Importance of Diazonium Salt
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