- Alkenes undergo a rapid reaction with chlorine and bromine at room temperature.
- This reaction can be used to identify if there is a C=C bond present.
- When bromine water is added dropwise to a sample of an alkene, bromine adds across the double bond.
- The orange colour disappears and goes colourless.
C3H6 + Br2 ---> CH3CHBrCHBrH
Propene + bromine ---> 1,2-dibromopropane
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