Sigma bonds are generated when atomic orbitals collide head-on. Pi bonds are created by sideways overlapping of atomic orbitals in addition to sigma bonds.
Because the orbitals of a sigma bond lie parallel to the internuclear axis, there is more effective orbital overlap than when pi bonds are formed because the orbitals are perpendicular to the internuclear axis.
The sigma bond is stronger than the pi bond because to the large difference in orbital overlap.
The amount to which the orbitals overlap determines the bond’s strength. The stronger the relationship, the greater the overlap.
The coaxial overlap of the atomic orbitals that are aligned along the internuclear axis forms a sigma bond, and the extent of overlap is greatest.
Because a pi bond is produced by the lateral overlap of atomic orbitals that are perpendicular to the internuclear axis, the amount of orbital overlapping in a sidewise manner is limited.
Final Answer
As a result, the sigma connection is more powerful than the Pi bond.
