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NEET levelSingle correct optionDifficulty 1 of 3o2004

Cyclohexene is treated with in . The product is

  1. Acis-1,2-dibromocyclohexane
  2. Btrans-1,2-dibromocyclohexane
  3. C1,1-dibromocyclohexane
  4. Dbromocyclohexane

Answer: B

The reaction goes through a cyclic bromonium ion. Bromide attacks from the face opposite to the bridging bromine, so the two Br atoms add anti. The product is trans-1,2-dibromocyclohexane.
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