Direct nitration of aniline with nitric acid gives a complex mixture of mono, di- and tri-nitro compounds and oxidation products. If −NH2 group is protected by acetylation and then nitrated with nitrating mixture, p-isomer is the main product.

When aniline is nitrated then the products are?

However, under controlled conditions, if the nitration of aniline is carried out, then the major products are p-nitroaniline and m-nitroaniline.

Why aniline Cannot undergo nitration reaction with hno3?

Direct nitration of aniline is not a feasible process because nitric acid oxidises most of aniline to give tarry oxidation products along with only a small amount of nitrated products.

What happens when aniline undergoes nitration is strongly acidic medium?

Nitration of aniline in strongly acidic medium, results in the formation of m-nitroaniline also. This is because. nitro group goes always to the meta position irrespective of the substituents. nitration of aniline is a nucleophilic substitution reaction in strongly acidic medium.

Can aniline be nitrated directly?

Direct nitration of aniline is not a feasible process because nitric acid oxidizes most of aniline to give tarry oxidation products along with only a small amount of nitrated products. By doing this it gets oxidized into protonated aniline which gives 47% m-nitroaniline.

Aniline + Nitric Acid = Rocket fuel in RamZland!🔥🚀 HNO3 + C6H5NH2 → C6H6N2O2 + H2O

21 related questions found

Why does aniline give m-nitroaniline?

Nitration of aniline in strong acidic medium also gives m-nitroaniline because. Inspite of substituents nitro group always goes to only m-position. ... In absence of substituents nitro group always goes to m-position.

Why is aniline acetylated before nitration?

Acetylation is performed before nitration of aniline. Direct nitration isn't administered because NH2 may be a highly activating group and it'll result in the reaction between NH2 and HNO3. In the above reaction, aniline may be a moderate base as it's an electron rich compound and acts as a good nucleophile.

Which of the following product is not possible while nitration of aniline?

Explanation: The direct nitration of aniline is not [possible and it is a very difficult process. During the nitration of aniline, the aniline gets converted into a protonated aniline after oxidation. In direct nitration, nitric acid gives mostly tarry oxidized products after oxidation.

Why nitration of aniline is carried out after acylation?

(a) Acylation activates the -NH2 group.

Why does nitration of aniline produce meta product?

The anilinium group, no longer possessing a free electron pair (tied up with H^+), deactivates the aromatic ring toward electrophilic substitution,also anilinium ion which is meta directive. Hence nitration of aniline gives meta derivative along with ortho and para.

Which of the following is are correct regarding nitration of aniline with conc hno3 and conc h2so4?

Generally in the presence of nitric acid and sulphuric acid, aniline forms anilinium nitrate as an intermediate product and forms azobenzene nitrate. Hence, option C is the correct answer.

What is nitration of phenol?

Nitration of Phenols. When phenol is treated with concentrated nitric acid, the nitration results in the formation of 2, 4, 6-trinitrophenol (commonly called picric acid). Formation of 2, 4, 6-trinitrophenol.

When aniline is treated with nitrating mixture at 288 K the product obtained is?

2,4-dinitroaniline.

What happens when aniline react with acetic anhydride?

Aniline reacts with acetic anhydride to form Acetanilide by nucleophilic substitution reaction and the reaction is called acetylation. In this reaction, aniline acts as the nuclepohile and acyl (CH₃CO-) group from acetic anhydride acts as the electrophile.

What happens when aniline reacts with nitrating mixture?

The nitration of aniline gives o− nitroaniline, m− nitroaniline and p− nitroaniline.

Why is it not possible to obtain 2 and 4 nitroaniline by direct nitration of aniline?

Answer: Direct nitration of aniline is not possible. ... so NO2 reacts with NH2 instead of coming to benzene ring of aniline so to make possible the reaction of nitration of aniline , acetylation of NH2 grp is done to make it less reactive for coming NO2 grp nd this acetylation called schotten baumen reaction.

How can you separate the products ortho and para in the nitration of acetanilide?

Ortho nitro acetanilide is separated from para nitro acetanilide by dissolving the solution in ethanol. o-nitroacetanilide is more soluble in ethanol as compared to water.

What is obtained on acetylation of aniline?

So, the reaction by which acetanilide can be formed is by acetylation of aniline. In the acetylation of amide, aniline reacts with ethanoic anhydride in presence of base like pyridine to form acetanilide. So, acetanilide can be produced by acetylation of aniline. Hence, the correct answer is option C.

Why does acetylation of NH2 group of aniline reduce its activating effect?

The acetylation of —NH₂ group of aniline reduce its activating effect because the lone pair of electrons on nitrogen of acetanilide interacts with oxygen atom due to resonance.

Why is aniline acetylated?

To control the nitration reaction and tarry oxidation products and nitro derivatives products formation, the NH₂ group of aniline is acetylated before carrying out nitration. Here, the major product is p-Nitroaniline. The amine group is protected by acetylation reaction with acetic anhydride.

What is the purpose of acetylation?

Proteins that replicate DNA and repair damaged genetic material are created directly by acetylation. Acetylation also helps in DNA transcription. Acetylation determines the energy that proteins use during duplication and this determines the accuracy of copying the genes.

Why pKb of aniline is more than that of methylamine?

pKb of aniline is more than that of methylamine, why. Ans. Because aniline is less basic than methylamine due to stabilisation lone pair of N by resonance effect.

How is anilinium ion meta directing?

The NH₂ group in aniline is ortho and para guiding group because due to resonance, they will release electrons to the ring and at the same time remove the electrons towards themselves due to +1 impact from the aromatic ring. ... The substituent is called a meta directing group if the opposite is observed.

What is the nature of aniline?

Aniline is an organic compound with the formula C₆H₅NH₂. Consisting of a phenyl group attached to an amino group, aniline is the simplest aromatic amine.