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प्रश्न
Account for the following:
Aniline does not undergo Friedel-Crafts reaction.
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उत्तर
Aniline being a Lewis base reacts with Lewis acid AlCl3 to form a salt.
\[\ce{C6H5\overset{\bullet\bullet}{N}H2 + AlCl3 -> C6H5\overset{+}{N}H2AlCl^-_3}\]
Due to the presence of a positive charge on N-atom in the salt, the group \[\ce{-\overset{+}{N}H2AlCl^-_3}\] acts as a strongly deactivating group. As a result, it reduces the electron density in the benzene ring and inhibits the electrophilic substitution reaction. Therefore, aniline does not undergo the Friedel-Crafts reaction.
संबंधित प्रश्न
Which of the following reagent can be used to convert nitrobenzene to aniline?
The method by which aniline cannot be prepared is ____________.
When 
is reduced with Sn/HCl the pair of compounds formed are ____________.
Among the following, the reaction that proceeds through an electrophilic substitution is:
Write down the possible isomers of the C4H9NO2 give their IUPAC names.
There are two isomers with the formula CH3NO2. How will you distinguish between them?
How will you convert nitrobenzene into N-phenylhydroxylamine?
How will you convert nitrobenzene into aniline?
Identify A, B and C.
Account for the following.
Aniline does not undergo Friedel – Crafts reaction.
