MCQ
A direct iodination of benzene is not possible because:
  • A
    Iodine is an oxidising agent.
  • B
    Resulting C6​H5​I is reduced to C6​H6​ by HI.
  • C
    HI is unstable.
  • D
    The ring gets deactivated.

Answer

  1. Resulting C6​H5​I is reduced to C6​H6​ by HI.

Explanation:

The direct iodination reaction of benzene is,

C6​H6​ + I$\rightleftharpoons$ C6​H5​I + HI

This reaction is a reversible reaction. The product HI reacts with iodobenzene to get back benzene.

Hence, direct iodination of benzene is not possible because the product C6​H5​I is reduced by HI.

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