JEE Advanced · 2015 · 24 May 2015 · Paper 1 · Hydrocarbons

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In the following reaction, the major product is
  1. (A)(see structure)
  2. (B)(see structure)
  3. (C)(see structure)
  4. (D)(see structure)
    ✓ Correct

Answer: (D)

Solution

This is an allylic bromination reaction. The reaction proceeds via a radical mechanism, and the most stable allylic radical is formed. The bromine adds at the position that gives the most substituted alkene, which is structure (D).

JEE Advanced · 2015 · 24 May 2015 · Paper 1 · One or more correct options

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