Delocalized Pi Bond


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Aimee Alvarado 3J
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Joined: Wed Sep 30, 2020 9:47 pm

Delocalized Pi Bond

Postby Aimee Alvarado 3J » Sun Nov 29, 2020 11:30 pm

In sapling, there was a question in regards to a delocalized pi bond. What is that, and how would you recognize it in an example?

Rose_Malki_3G
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Re: Delocalized Pi Bond

Postby Rose_Malki_3G » Sun Nov 29, 2020 11:32 pm

Delocalized pie bonds occur when pie orbitals extend across more than 2 atoms in a molecule. In terms of lewis structures, you can show this by drawing multiple resonance structures.

Gwendolyn Hill 2F
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Re: Delocalized Pi Bond

Postby Gwendolyn Hill 2F » Sun Nov 29, 2020 11:34 pm

Delocalized pi bonds are pi bonds where the e- are free to move over more than two nuclei, like the example of Benzene that Prof. Lavelle gave. Delocalized pi bonds can also be thought of as where there are pie bonds with resonance structures, since the lewis structures we draw are not entirely accurate; in reality, the bond lengths are combinations of the resonance structures, and therefore if there are any pi bonds involved in the changing resonance structures then those pibonds are delocalized. When it is just between two atoms and it does not have any free space for the e- to move between other atoms as well, it is localized.

Nina Tartibi 1F
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Re: Delocalized Pi Bond

Postby Nina Tartibi 1F » Sun Nov 29, 2020 11:45 pm

Correct me if I'm wrong, but I believe delocalized bonds are when the electrons can move around to different bonds, similar to resonance. So does this mean that resonant structures have delocalized bonds?

Jeffrey Fenn 1G
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Re: Delocalized Pi Bond

Postby Jeffrey Fenn 1G » Sun Nov 29, 2020 11:46 pm

I think of delocalized pi bonds being involved in resonance structures if that helps!

Griffin G
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Re: Delocalized Pi Bond

Postby Griffin G » Sun Nov 29, 2020 11:55 pm

A delocalized pi bond is when there are multiple resonance structures for a molecule, and they include double bonds that are in different positions. You could recognize this in a structure like benzene with rings.

Nick Saeedi 1I
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Re: Delocalized Pi Bond

Postby Nick Saeedi 1I » Mon Nov 30, 2020 12:24 am

It is related to resonance structures because if the bond is delocalized, the electrons can move.

Elizabeth Kaplan 3I
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Re: Delocalized Pi Bond

Postby Elizabeth Kaplan 3I » Mon Nov 30, 2020 12:27 am

Delocalized pi bonds are when electrons are free to move around in the molecule. Thus, delocalized pi bonds occur when the Lewis structure has resonance and has double or triple bonds. The delocalized electrons in the double or triple bonds result in a delocalized pi bond.

Sam Wentzel 1F 14B
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Re: Delocalized Pi Bond

Postby Sam Wentzel 1F 14B » Mon Nov 30, 2020 12:55 am

A pi bond is considered delocalized only when the molecule has resonance structures (differing numbers of bonds around a central atom).

MichaelRaad_1F
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Re: Delocalized Pi Bond

Postby MichaelRaad_1F » Mon Nov 30, 2020 1:22 am

A delocalized pi bond is essentially a pi bond of a molecule that has resonance. If the molecule has resonance (as can be determined by the Lewis structure), then it can have a delocalized pi bond.

Madison Wong 3H
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Re: Delocalized Pi Bond

Postby Madison Wong 3H » Mon Nov 30, 2020 7:09 pm

A delocalized pi bond is similar to the concept of delocalized electrons that occur within resonance structures. When a molecule has different resonant structures, the pi bond can be blended to different areas.


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