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प्रश्न
Write a short note on the following.
Hofmann’s bromide reaction
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उत्तर
When Amides are treated with bromine in the presence of an aqueous or ethanolic solution of KOH, primary amines with one carbon atom less than the parent amides are obtained.
\[\begin{array}{cc}
\ce{O}\phantom{............................................}\\
||\phantom{............................................}\\
\ce{\underset{\underset{(R = Alkyl (or) Aryl)}{(amide)}}{R - C - NH2} ->[Br2/KOH] \underset{(Primary amine)}{R - NH2 + K2 CO3} + KBr + H2O}
\end{array}\]
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संबंधित प्रश्न
The method by which aniline cannot be prepared is ____________.
‘A’ is:
How will you convert nitrobenzene into o and p-nitrophenol?
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Identify compounds A, B and C in the following sequence of reaction.
\[\ce{C6H5NH2 ->[(CH3CO2)O][pyridine] A ->[HNO3][H2SO4, 288 K] B ->[H2O/H^+] C}\]
Arrange the following.
In increasing order of basic strength aniline, p-toluidine and p-nitro aniline
Arrange the following.
In increasing order of basic strength C6H5NH2, C6H5NHCH3, C6H5NH2, p-Cl-C6H4-NH2
Identify A to E in the following sequence of reactions.
Account for the following.
Aniline does not undergo Friedel-Crafts reaction.
Account for the following.
Aniline does not undergo Friedel–Crafts reaction
