First slide

Chemical properties of Amines

Question

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

Moderate

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.

Solution

The reason for formation of an unexpected amount of m -nitroaniline is that under strongly acidic condition of nitration, most of the aniline is converted into anilinium ion and since, $\overset{+}{- N} H_{3}$ .Due to strong -I effect,very little ortho product(2%) and a large amount of m -nitroaniline(47%) and para nitro aniline (51%) are obtained.

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