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A pi bond's relative weakness can also be explained by the fact that, due to the parallel orientation of the p-orbitals involved in a pi bond, there is significantly less overlap between orbitals. sigma bonds, on the other hand, form bonding orbitals directly between the nuclei of the bonding atoms, resulting in greater overlap and a stronger bond.
Arshia Ramesh 1G wrote:i read on one of the reviews that a pi bond is weaker than a sigma bond but why is that?
It is because a pi bond does not allow for rotation and would break while a sigma bond does allow for rotation.
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