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JEE Main 202430 JanuaryMorning Shift
Exam
JEE Main
Year
2024
Date
30 January
Shift
Morning Shift
Subject
Chemistry
Chapter
Amines

JEE Main 2024 · 30 January · Morning Shift · Chemistry · Amines

The final product A , formed in the following multistep reaction...

The final product AA, formed in the following multistep reaction sequence is:

The final product A , formed in the following multistep reaction sequence is:

Options

  1. AThe group 14 elements A and B have the first ionisation enthalpy values of 708 and 715 ~kJ ~mol^ -1 respectively. The
  2. BThe group 14 elements A and B have the first ionisation enthalpy values of 708 and 715 ~kJ ~mol^ -1 respectively. The
  3. CThe group 14 elements A and B have the first ionisation enthalpy values of 708 and 715 ~kJ ~mol^ -1 respectively. The
  4. DThe group 14 elements A and B have the first ionisation enthalpy values of 708 and 715 ~kJ ~mol^ -1 respectively. The

Correct answer

B. The group 14 elements A and B have the first ionisation enthalpy values of 708 and 715 ~kJ ~mol^ -1 respectively. The

Step-by-step solution

Bromobenzene reacts with magnesium in dry ether (diethyl ether) to form phenylmagnesium bromide, often abbreviated as PhMgBrPhMgBr.

The resulting phenylmagnesium bromide reacts with carbon dioxide in the presence of an acidic medium to form benzoic acid.

Heating benzoic acid with ammonia can lead to a reaction known as the Schotten-Baumann type reaction, which is a method for the amidation of carboxylic acids. In this reaction, the carboxylic acid group of benzoic acid reacts with ammonia  to form an amide, benzamide, under heating conditions.

When an amide is treated with bromine in an aqueous or ethanolic solution of sodium hydroxide, degradation of amide takes place leading to the formation of primary amine.

In this case, it is an hoffmann bromamide reaction, aniline is formed.

The final product A , formed in the following multistep reaction sequence is:

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