BRAINCAKEAddition of Hydrogen Halides
Alkenes react with the hydrogen halides HCl, HBr and HI at room temperature. The H atom adds to one carbon of the C=C and the halogen atom adds to the other, giving a halogenoalkane.
CH2=CH2 + HBr → CH3CH2Br
The product here is bromoethane. The hydrogen halide is used as a gas, or as a concentrated solution. Cyclohexene reacts with HCl in the same way to give chlorocyclohexane.
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More in Alkenes
- Addition Reactions
- Hydrogenation
- Halogenation
- Hydration
- Electrophile
- Nucleophile
- Electrophilic Addition Mechanism
- Electrophilic Addition of Hydrogen Halides
All 19 lessons in Alkenes · All Edexcel AS-level Chemistry topics