Why are pi bonds more reactive?
π bonds are more reactive than σ bonds because their electrons are not held as tightly by the nuclei.
σ bonds are formed by the end-on overlap of orbitals, so the electrons are on a line joining the two nuclei.
They are so strongly attracted to the nuclei that other reactants have difficulty in removing them.
σ bonds are not very reactive.
π bonds are formed by the side-on overlap of
On average, the electrons are further away from the nuclei, so they are not held as tightly.
Other reactants can more easily attack these electrons, so π electrons are more reactive than σ bonds.