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प्रश्न
Write a short note on the following.
Gomberg reaction
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उत्तर
Benzene diazonium chloride reacts with benzene in the presence of sodium hydroxide to give biphenyl. This reaction is known as the Gomberg reaction.
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संबंधित प्रश्न
Write a short note on diazotisation.
Product ‘P’ in the above reaction is:
The major product of the following reaction:
Write a short note on the following.
Coupling reaction
Account for the following.
Amines are more basic than amides.
Identify A, B, C and D.
\[\ce{aniline + benzaldehyde -> A ->[Conc. HNO3][B] C + D}\]
A dibromo derivative (A) on treatment with KCN followed by acid hydrolysis and heating gives a monobasic acid (B) along with the liberation of CO2. (B) on heating with liquid ammonia followed by treating with Br2/KOH gives (C) which on treating with NaNO2 and HCl at low temperature followed by oxidation gives a monobasic acid (D) having molecular mass 74. Identify A to D.
Why is \[\ce{NH2}\] group of aniline acetylated before carrying out nitration?
Coupling of benzene diazonium chloride with 1-naphthol in alkaline medium will give:
The major product of the following reaction is:
