Diazonium Salts
During preparation of benzene diazonium chloride from aniline, the reaction mixture is maintained at:
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About This Question
- Subject
- chemistry
- Chapter
- organic compounds containing nitrogen
- Topic
- diazonium salts
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
273-278 K
Diazotization of aniline with nitrous acid forms benzene diazonium chloride, which is stable only at low temperature. If the temperature rises significantly above about 278 K, the diazonium salt tends to decompose, reducing yield and causing side reactions. Therefore the reaction is carried out in an ice-cold medium, typically 273-278 K. This temperature control is essential for safe and efficient diazonium salt preparation.
This easy difficulty chemistry question is from the chapter organic compounds containing nitrogen, covering the topic of diazonium salts. It appeared in the 2025 exam.
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