A Pi Bond is weaker than the Sigma Bond and is found in the alkenes and alkynes. If we look at the Pi Bonds definition, it is the bond formed by side by side overlapping of the atomic orbitals. This bond emits a high amount of energy which makes this bond unstable. Due to the weakness of this bond, it can not react as fast as the other compounds. Another feature of the Pi Bond is that it always keeps wandering behind the Sigma Bond.