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प्रश्न
Write a short note on the following.
Coupling reaction
उत्तर
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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संबंधित प्रश्न
The conversion of primary aromatic amines into diazonium salts is known as ___________
Product ‘P’ in the above reaction is:
Ammonium salt of benzoic acid is heated strongly with P2O5 and the product so formed is reduced and then treated with NaNO2/HCl at low temperature. The final compound formed is ____________.
Identify X in the sequence given below
The major product of the following reaction:
Account for the following.
Diazonium salts of aromatic amines are more stable than those of aliphatic amines.
Identify A, B, C and D.
\[\ce{aniline + benzaldehyde -> A ->[Conc. HNO3][B] C + D}\]
Why is \[\ce{NH2}\] group of aniline acetylated before carrying out nitration?
What would be the major product of the following reaction?
\[\ce{C6H5 - CH2 - OC6H5 + HBr -> A + B}\]
Coupling of benzene diazonium chloride with 1-naphthol in alkaline medium will give: