Return to Contents Chapter 6: Reactions of Alkenes: Addition Reactions Ch 6 contents

Reaction of Alkenes with HBr (radical)

radical hydrobromination of alkenes
Reaction type: Radical Addition

Summary

addition of HBr to propene under radical conditions
MECHANISM FOR RADICAL REACTION OF ALKENES WITH HBr

Step 1:
An electrophilic bromine radical adds to the alkene to generate the 2o radical.
addition of HBr to C=C under radical conditions
Step 2:
Radical abstracts a H atom from another molecule of HBr, creating the alkyl bromide and another bromine radical.

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  Dr. Ian Hunt, Department of Chemistry, University of Calgary