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Question
Give a reason for the sigma (σ) bond is stronger than the Pi (π) bond.
Solution
- The strength of the bond depends on the extent of overlap of the orbitals. Greater the overlap, the stronger is the bond.
- A sigma bond is formed by the coaxial overlap of the atomic orbitals which are oriented along the internuclear axis, hence the extent of overlap is maximum.
- A pi bond is formed by the lateral overlap of the atomic orbitals which are oriented perpendicular to the internuclear axis, hence the extent of orbital overlapping in a sidewise manner is less.
Hence, the sigma (σ) bond is stronger than the Pi (π) bond.
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