BRAINCAKEElimination Reaction
In an elimination reaction a halogenoalkane loses a molecule of hydrogen halide (HX) and forms an alkene. The hydrogen and the halogen are removed from neighbouring carbon atoms.
The reagent is potassium hydroxide dissolved in ethanol, and the mixture is heated. In these conditions the hydroxide ion acts as a base, removing a proton, rather than as a nucleophile.
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All 16 lessons in Halogenoalkanes · All AQA AS-level Chemistry topics