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Nitration of aniline is achieved by...

Nitration of aniline is achieved by

A

direct nitration with nitrating mixture under reflux

B

using fuming `HNO_(3)`

C

acetylation followed by nitration and subsequent hydrolysis

D

`KNO_(3)` and conc `HNO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D

Direct nitration of aniline should be avoided as it yields tarry oxidation products in addition to the nitro derivatives However we can control the nitration reaction by protecting the `-NH_(2)` group by acetylation reaction with acetic anhydride
.
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Knowledge Check

  • Nitration of aniline is carried out after acylation because

    A
    Acylation deactivates the `-NH_(2)` group
    B
    Oxidation can be prevented
    C
    `o-` " and " p-` products are obtained in good yields
    D
    all the three
  • Nitration of aniline in strong acidic medium also gives m-nitroaniline because

    A
    in absence of substituents nitro group always goes to m-position
    B
    in electrophilic substitution reactions amino group is meta directive
    C
    in spite of substituents nitro group always goes to only m-position
    D
    in acidic (strong) medium aniline is present as anilinium ion
  • Nitration of aniline in strong acidic medium also gives m-nitroaniline because

    A
    inspite of substituents nitro group always goes to only m-position
    B
    in electrophilic substitution reactions amino group is meta directive
    C
    in absence of substituents nitro group always goes to m-position
    D
    in acidic (strong) medium aniline is present as anilinium ion.
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    Direct nitration of aniline is not carried out. Explain.

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    Nitration of aniline in strong acidic medium also gives m-nitroaniline because:

    Nitration of aniline also gives m - nitroaniline along with o - nitro and p - nitroaniline , in strong acidic medium because

    Statement 1: Nitration of aniline is generally performed by protecting amino group through acetylation and Statement 2: Acetylation decreases the electron density in aromatic ring.