Fundamentholfundamenthol
NEET2022Chemistry
Q.

Which of the following is suitable to synthesize chlorobenzene ?

  1. A

    1

  2. B

    2

  3. C

    3

  4. D

    4

Solution

Chlorobenzene is best prepared by electrophilic aromatic substitution of benzene with chlorine in the presence of a Lewis acid catalyst.

Reaction: CH + Cl CHCl + HCl.

Option (1) corresponds to a Sandmeyer reaction starting from a diazonium salt obtained from aniline, not from phenol, so the listed sequence will not work.

Options (2) and (3) lack a halogen source or a suitable mechanism to install a chloride on the ring.

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