sigma/pi bond


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Dang Lam
Posts: 55
Joined: Thu Jul 27, 2017 2:01 am

sigma/pi bond

Postby Dang Lam » Mon Nov 13, 2017 8:26 pm

Clarification: So when you have a double bond, the first bond would be consider sigma bond and the second one would be pi bond? For tripple bond, the first one would be sigma and the other two would be pi?

Michelle Steinberg2J
Posts: 73
Joined: Fri Sep 29, 2017 6:04 am

Re: sigma/pi bond

Postby Michelle Steinberg2J » Mon Nov 13, 2017 9:48 pm

Dang Lam wrote:Clarification: So when you have a double bond, the first bond would be consider sigma bond and the second one would be pi bond? For tripple bond, the first one would be sigma and the other two would be pi?


Yes! This is correct.

In lecture, Lavelle stated that a single bond (such as that between F-F) is one sigma bond. A double bond (such as that between 0=0) is one sigma bond and one pi bond. A triple bond is one sigma and two pi bonds.

David Zhou 1L
Posts: 61
Joined: Fri Sep 29, 2017 6:04 am

Re: sigma/pi bond

Postby David Zhou 1L » Fri Nov 17, 2017 7:58 pm

Yes, since the s orbital can only hold two electrons due to the Pauli Exclusion Principle, only the first bond will be a sigma bond.

aaron tang 2K
Posts: 49
Joined: Thu Jul 27, 2017 2:01 am

Re: sigma/pi bond

Postby aaron tang 2K » Fri Nov 17, 2017 11:19 pm

Yes that is correct, as you said with a double bond, the first bond is a sigma bond and the second one is pi bond. For a triple bond, the first bond is a sigma bond and the second and the third bonds are pi bonds

Aya Shokair- Dis 2H
Posts: 58
Joined: Fri Sep 29, 2017 6:07 am

Re: sigma/pi bond

Postby Aya Shokair- Dis 2H » Sat Nov 18, 2017 9:47 pm

Yes, if you can imagine. You have two atoms that both contain p-orbitals. When they form a bond, 1 of the 3 p-orbitals of each atom interact head-on with a lot of overlap. The other 2 orbitals are parallel to its partner orbital in the other atom. These orbitals will form pi bonds.


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