Diazonium Replacement
Easychemistry
Replacement of diazonium with –OH occurs by heating aqueous solution yielding:
Select the correct option:
Solution
Incorrect! Answer:
Phenol
- Reactant: A benzene diazonium salt (C6H5N2+Cl−).
- Conditions: Simply warming the aqueous solution of the diazonium salt to about 50–100∘C.
- Chemical Change: The N2 group departs as a gas, and the vacant position is attacked by a water molecule acting as a nucleophile.
- Mechanism: C6H5N2+Cl−+H2OΔC6H5OH+N2↑+HCl.
- Result: Phenol is produced. This is a very efficient way to convert aniline (via diazonium) into phenol.
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About This Question
- Subject
- chemistry
- Chapter
- nitrogen organics
- Topic
- diazonium replacement
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Phenol
- Reactant: A benzene diazonium salt (C6H5N2+Cl−).
- Conditions: Simply warming the aqueous solution of the diazonium salt to about 50–100∘C.
- Chemical Change: The N2 group departs as a gas, and the vacant position is attacked by a water molecule acting as a nucleophile.
- Mechanism: C6H5N2+Cl−+H2OΔC6H5OH+N2↑+HCl.
- Result: Phenol is produced. This is a very efficient way to convert aniline (via diazonium) into phenol.
This easy difficulty chemistry question is from the chapter nitrogen organics, covering the topic of diazonium replacement. It appeared in the 2025 exam.
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