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JEE Advanced levelSingle correct optionDifficulty 3 of 3o2208

Cyclohexene is treated with in methanol as solvent. The major product is

  1. Atrans-1-bromo-2-methoxycyclohexane
  2. Btrans-2-bromocyclohexan-1-ol
  3. Ccis-1-bromo-2-methoxycyclohexane
  4. D1,2-dibromocyclohexane only

Answer: A

The bromonium ion is opened by the solvent, methanol, which is in large excess. The attack is anti, so Br and are trans. The product is trans-1-bromo-2-methoxycyclohexane.
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