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Cyclohexene reacts with mCPBA in . The product is

  1. Acyclohexane-1,2-diol
  2. Bcyclohexanol
  3. Ccyclohexanone
  4. Dcyclohexene oxide (7-oxabicyclo[4.1.0]heptane)

Answer: D

A peroxy acid transfers an oxygen atom to the C=C bond in one concerted step, forming an epoxide. Without water or acid present the epoxide is not opened, so cyclohexene oxide is isolated.
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