AQA A Level Chemistry

Revision Notes

3.7.4 Elimination

Mechanism: Elimination

  • In an elimination reaction, a small molecule is removed leaving behind an alkene
  • This is another reaction of halogenoalkanes
  • The halogenoalkanes are heated with ethanolic sodium hydroxide causing the C-X bond to break heterolytically, forming a X ion and leaving an alkene as organic product
    • E.g. bromoethane reacts with ethanolic sodium hydroxide when heated to form ethene

Halogen Compounds Elimination, downloadable AS & A Level Chemistry revision notes

Hydrogen bromide is eliminated to form ethene

Elimination reaction of halogenoalkane, downloadable AS & A Level Chemistry revision notes

Elimination Mechanism of 2-bromopropane with hydroxide ions


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