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International Edexcel AS chemistry

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  1. Topic 4: introductory organic chemistry
    The fundamentals
    2 Topics
  2. Functional groups and homologous series
    2 Topics
  3. Nomenclature
    2 Topics
  4. Structural isomerism
    2 Topics
  5. Types of reaction
    2 Topics
  6. Substitution reactions
    2 Topics
    1. Substitution reactions notes
    2. Substitution reactions past papers
  7. Hazards, risks and risk assessments
  8. Alkanes from crude oil
    1 Topic
  9. Alkanes as fuels
    1 Topic
International Edexcel AS chemistry Substitution reactions
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Lesson 6 of 9
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Substitution reactions

Curuculum ref: 4.18

Learning objectives :

  • understand the mechanism of the free radical substitution reaction between an
    alkane and a halogen:
    (i) using free radicals, which are species with an unpaired electron, represented by
    a single dot
    (ii) showing the initiation step of the mechanism, with curly half-arrows for free
    radical formation
    (iii) showing the propagation and termination steps of the mechanism
    (iv) having limited use in synthesis because of further substitution reactions