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Question
Write a short note on the following.
Coupling reaction
Solution
Benzene diazonium chloride reacts with electron-rich aromatic compounds like phenol, aniline to form brightly coloured azo compounds. Coupling generally occurs at the para position. If para position is occupied then coupling occurs at the ortho position. Coupling tendency is enhanced if an electron-donating group is present at the para-position to \[\ce{-\overset{+}{N2}Cl^-}\] group. This is an electrophilic substitution.
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RELATED QUESTIONS
The conversion of primary aromatic amines into diazonium salts is known as ___________
Write a short note on Diazotisation
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Write a short note on the following.
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Account for the following.
Diazonium salts of aromatic amines are more stable than those of aliphatic amines.
Account for the following.
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\[\ce{aniline + benzaldehyde -> A ->[Conc. HNO3][B] C + D}\]
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\[\ce{C6H5 - CH2 - OC6H5 + HBr -> A + B}\]
