1. Introduction to Alkene Addition Reactions
Section

2. 9.1 Addition Reactions Addition is the opposite of elimination
A pi bond is converted to a sigma bond
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.
Klein, Organic Chemistry 2e

3. 9.1 Addition Reactions
A pi bond will often act as a Lewis base (as a nucleophile or as a Brønsted-Lowry base)
Why are pi bonds more reactive in this sense than sigma bonds?
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.
Klein, Organic Chemistry 2e

4. 9.2 Addition / Elimination Equilibria
Because an addition is the reverse of an elimination, often the processes are at equilibrium
Heat is used to favor elimination.
Most addition reactions occur at room temperature.
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.
Klein, Organic Chemistry 2e