Difference Between Sigma and Pi Bonds

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Jessie Hsu 1C
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Joined: Wed Sep 30, 2020 9:49 pm

Difference Between Sigma and Pi Bonds

Postby Jessie Hsu 1C » Sat Nov 21, 2020 2:21 am

Hi everyone, I am a little confused about the number of bonds related to sigma and pi bonds. To clarify, a pi bond is only one bond even though there are two interacting electron densities on the internuclear axis? The example Dr. Lavelle showed using two markers and his hands make it seem like a pi bond is two bonds.

IsaacLaw1E
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Re: Difference Between Sigma and Pi Bonds

Postby IsaacLaw1E » Sat Nov 21, 2020 10:23 am

The two marker thing shows that there are two places where the orbitals interact, not that there are two pairs of electron densities interacting. There is only one pair of electron densities, one pair of electrons, and one bond formed.

Sophia Stewart 3F
Posts: 105
Joined: Wed Sep 30, 2020 9:48 pm

Re: Difference Between Sigma and Pi Bonds

Postby Sophia Stewart 3F » Sat Nov 21, 2020 10:54 am

It is one bond formed between two electrons. If you are confused, it might help to think about a lewis structure. A single bond is represented by 2 valence electrons, yet it is still only one bond.

Pranav Daggubati 3C
Posts: 118
Joined: Wed Sep 30, 2020 9:35 pm

Re: Difference Between Sigma and Pi Bonds

Postby Pranav Daggubati 3C » Sat Nov 21, 2020 10:56 am

You can think of it as each of the electrons in a pi bond being in different spaces but still make up one bond.


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