Question

write any three difference between sigma bond ahd pi bond​

Answer 1

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Difference Between Sigma and Pi Bond

While sigma and pi bonds are used to describe some features of covalent bonds and molecules, there are significant differences between the two. We will look at some differences between sigma and pi bond below.

Difference Between Sigma and Pi bond

Sigma Bond

• During sigma bond formation overlapping orbitals can either be one hybrid orbital and a single pure orbital, or two pure orbitals and two hybrid orbitals.
• Sigma bonds are known to exist independently and allow free rotation.
• Sigma bonds are stronger bonds.
• Sigma bonds are formed first when atoms interact.
• During the bonding between two given atoms,
• Only one sigma bond is formed.
• Sigma bonds are known to have cylindrical charge symmetry around the axis of the bond.
• Atoms with sigma bonds can be highly reactive.
• Sigma bond can be used to determine the shapes of molecules.

Pi Bond

• During pi bond formation overlapping orbitals must be two unhybridized orbitals.
• Pi-bonds must always exist along with sigma bond and the rotation is restricted.
• Pi bonds are usually less powerful compared to sigma bonds.
• Pi bonds between two atoms are formed after sigma bonds are formed between them.
• Here two pi bonds can exist between two atoms.
• No symmetry exists in pi bonds.
• Atoms with pi bonds are not as reactive in nature when compared to those with only sigma bonds.
• Pi bond cannot be used for the same purpose.

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Answer 2

sigma bond:

➡️A sigma bond is formed by the axial overlap of orbitals.

➡️extent of overlapping is more hence the bond is stronger.

➡️A sigma bond involves overlap pf s-s ,s-p, p-p orbitals.

➡️free rotation of atoms is possible across a sigma bond.

pi bond:

➡️A pi bond is formed by the side ways overlap of orbitals.

➡️ extent of overlaping is less hence the bond is weak.

➡️A pi bond involves the overlap of p orbitals only.

➡️ there is no free rotation of atoms across a pi bond.

Hope it helps ✔︎✔️.