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JEE Main · 2024 · 06 Apr 2024 · Shift 2 · Hydrocarbons

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The major products formed:

A and B respectively are:
  1. (A)(see structures)
    Structure A
    A
    Structure B
    B
  2. (B)(see structures)
    Structure A
    A
    Structure B
    B
    ✓ Correct
  3. (C)(see structures)
    Structure A
    A
    Structure B
    B
  4. (D)(see structures)
    Structure A
    A
    Structure B
    B

Answer: (B)

Solution

The methoxy group is a strong activator and an ortho/para director. Nitration of anisole () gives predominantly the para product, p-nitroanisole (A). Brominating A with excess /Fe then substitutes at positions activated by (its ortho/para positions) rather than by the deactivating, meta-directing group, giving the dibromo product B with both bromines placed ortho to the methoxy group.

JEE Main · 2024 · 06 Apr 2024 · Shift 2 · Single correct option

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