Difference between Sigma & Pi

Moderators: Chem_Mod, Chem_Admin

Eileen Si 1G
Posts: 120
Joined: Fri Aug 30, 2019 12:17 am

Difference between Sigma & Pi

Postby Eileen Si 1G » Fri Oct 25, 2019 6:31 pm

What is the difference between sigma and pi bonds? Are there ever cases where both of them will be present at the same time in the same molecule?

Kavee Dodampahala 4E
Posts: 51
Joined: Sat Jul 20, 2019 12:17 am

Re: Difference between Sigma & Pi

Postby Kavee Dodampahala 4E » Fri Oct 25, 2019 7:55 pm

I know that both can exist at the same time in a molecule.

Joelle 3L
Posts: 50
Joined: Sat Jul 20, 2019 12:16 am

Re: Difference between Sigma & Pi

Postby Joelle 3L » Sat Oct 26, 2019 2:40 pm

Both sigma and pi bonds are covalent bonds and form by overlap of atomic orbitals. Sigma bonds are formed by end-to-end overlapping and Pi bonds are when the lobe of one atomic orbital overlaps another. Generally sigma bonds are stronger than pi bonds. They can occur in the same molecule.

805307623
Posts: 99
Joined: Fri Aug 09, 2019 12:17 am

Re: Difference between Sigma & Pi

Postby 805307623 » Sat Oct 26, 2019 4:30 pm

A single bond is a sigma bond, whereas a double bond is a sigma bond and a pi bond. A sigma bond is a basic covalent bond, with the bond in line with the bonding orbitals. Only one sigma bond can exist between any two atoms. A pi bond is a covalent bond between orbitals that are perpendicular to bond direction. I believe this usually occurs in p-orbitals and never s-orbitals.

RichBollini4G
Posts: 100
Joined: Wed Sep 18, 2019 12:18 am

Re: Difference between Sigma & Pi

Postby RichBollini4G » Mon Oct 28, 2019 2:35 pm

Joelle 3L wrote:Both sigma and pi bonds are covalent bonds and form by overlap of atomic orbitals. Sigma bonds are formed by end-to-end overlapping and Pi bonds are when the lobe of one atomic orbital overlaps another. Generally sigma bonds are stronger than pi bonds. They can occur in the same molecule.

Thank you, this was very helpful.

rachel liu 3k
Posts: 56
Joined: Sat Aug 17, 2019 12:16 am

Re: Difference between Sigma & Pi

Postby rachel liu 3k » Thu Oct 31, 2019 11:31 am

805307623 wrote:A single bond is a sigma bond, whereas a double bond is a sigma bond and a pi bond. A sigma bond is a basic covalent bond, with the bond in line with the bonding orbitals. Only one sigma bond can exist between any two atoms. A pi bond is a covalent bond between orbitals that are perpendicular to bond direction. I believe this usually occurs in p-orbitals and never s-orbitals.

Super helpful, thanks!


Return to “Sigma & Pi Bonds”

Who is online

Users browsing this forum: No registered users and 1 guest