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Amines

Question
CBSEENCH12009044
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Account for the following:
Aniline does not undergo Friedel Craft's reaction.

Solution

a Friedel -crafts reaction is carried out in the presence of AlCl3. but AlCl3 is acidic in nature, while aniline is a strong base. Thus, aniline reacts with AlCl3 to form a salt. Due to the positive charge on the N-atom, electrophilic substitution in the benzene ring is deactivated.Hence, aniline does not under go the Friedel-crafts reactions.

Aniline does not under Friedel-Craft reaction (alkylation and acetylation) due to the salt formation with aluminium chloride, the Lewis acid which is used as a catalyst. Due to this, the nitrogen of aniline acquires a positive charge and hence acts as a strong deactivating group for further reaction.

Some More Questions From Amines Chapter

Write structures of different isomeric amines corresponding to the molecular formula C4H11N.

Write IUPAC names of all the isomers.

What type of isomerism is exhibited by different pairs of amines?

How will you convert Benzene into N, N-dimethylaniline?

Arrange the following in increasing order of their basic strength:
C2H5NH2, C6H5NH2, NH3, C6H5CH2NH2 and (C2H5)2NH

Arrange the following in increasing order of their basic strength:
C2H5NH2, (C2H5)2NH, (C2H5)3N, C6H5NH2

Arrange the following in increasing order of their basic strength:
CH3NH2, (CH3)2NH, (CH3)3N, C6H5NH2, C6H5 CH2NH2

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