Q7 / 155 · WBJEE 2018 · Chemistry
Identify $'M'$ in the following sequence of reactions
- A
- Correct answerB
- C
- D
Solution
Given sequence of chemical equation is
The structural formula of $\mathrm{C}_{8} \mathrm{H}_{6} \mathrm{Cl}_{2} \mathrm{O}(\mathrm{M})$ will be
The various step involves in the above road map can be explain as follows
Step-I It involves the formation of an amide on reaction of ammonia and acetyl chloride so, $M$ must be
Step-II It involves the Hofmann-bromamide
reaction.
In this reaction, migration of an alkyl or aryl group takes place from carbonyl carbon of the amide to the $\mathrm{N}$ -atom. So, $\mathrm{C}_{8} \mathrm{H}_{8} \mathrm{Cl}$ NO must be an amide with structural formula.
The structural formula of $\mathrm{C}_{8} \mathrm{H}_{6} \mathrm{Cl}_{2} \mathrm{O}(\mathrm{M})$ will be
The various step involves in the above road map can be explain as follows
Step-I It involves the formation of an amide on reaction of ammonia and acetyl chloride so, $M$ must be
Step-II It involves the Hofmann-bromamide
reaction.
In this reaction, migration of an alkyl or aryl group takes place from carbonyl carbon of the amide to the $\mathrm{N}$ -atom. So, $\mathrm{C}_{8} \mathrm{H}_{8} \mathrm{Cl}$ NO must be an amide with structural formula.Hence, the correct answer is option: 'B'.