Halogenoalkanes

• Halogens + Alkanes =


  Halogenoalkanes - radical substitution recation
• How do halogens and alkanes react?

  Using UV light

  Hydrogen is replaced with Cl or Br
• What are the 3 stages?

  Initiation

  Propagation

  Termination
• Waht forms in the initiation stage?

  Radicals

  Cl2 -> Cl• + Cl•
• What happens in propagation?

  Radicals are used up and created
• What happens at termination?

  Radicals are destroyed

  Cl• + Cl• -> Cl2
• What's the issue with this type of reaction?

  • End up with a mixture of products - prevent this by having the reactant in excess ( higher chance of collision)
  • Can take place at any point tnof the carbon chain - mixture of structural isomers can form