Interaction | Reaction | Process     Data Page

Bromine adds to propene to give 1,2-dibromopropane in a stepwise manner.

The first step of the complexation involves the alkene's pi-system reacting with a bromine cation to give an intermediate carbeneium ion (also called a carbocation or a bromonium ion) and a bromide anion.

This step is a nucleophilic substitution, with the pi system nucleophile displacing the bromide ion nucleofuge (the leaving group) from Br+.
CH3–CH=CH2
  +  
Br2
         
  +  
Br–
Reactant Page Go To Go To
Propene     Reactions Using    Reactions Forming
Bromine     Reactions Using    Reactions Forming
Bromomethylmethylcarbenium ion     Reactions Using    Reactions Forming
Bromide ion     Reactions Using    Reactions Forming

Interaction, Reaction, Process defined as:
Addition: Electrophilic
British A-Level Chemistry: AS
Complexation or Coupling
Substitution: Nucleophilic Second Order
Type 16 Lewis Acid/Base Complexation Chemistry

© Mark R. Leach 1999 –

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