Chemistry Reference
In-Depth Information
The following represent reaction mechanisms involving free radicals:
This is an example of the homolytic cleavage of a bromine molecule to form two
bromide radicals. Note the use of single-barbed arrows to describe radical-based
mechanisms resulting in the movement of single electrons. For clarity, the bond
is elongated. Arrow pushing is illustrated below:
This is an example of the addition of a bromide radical to an olefin. Note that a
single-barbed arrow is used for each electron that is moving. Arrow pushing is
illustrated below:
This is an example of a step in the free-radical-mediated polymerization of
ethylene, forming polyethylene. As in the previous example, note that a single-
barbed arrow is used for each electron that is moving. Arrow pushing is illustrated
below:
