Delocalized electrons

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Jessica Yang 1J
Posts: 55
Joined: Fri Sep 29, 2017 7:03 am

Delocalized electrons

Postby Jessica Yang 1J » Sun Nov 05, 2017 9:40 pm

Hello,

I am confused about resonance structures and delocalized electrons. What is a delocalized electron and could you provide an example with the specific delocalized electrons marked or highlighted in some way?

jennywu
Posts: 16
Joined: Fri Sep 29, 2017 7:07 am
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Re: Delocalized electrons

Postby jennywu » Sun Nov 05, 2017 10:07 pm

Delocalized electrons are spread across more than one atom or shared. Think of it as an electron probability cloud spread over the entire molecule or between two atoms at any given moment the moving electron could be anywhere in that cloud. In one instant it could be forming bonds with one atom and in another instant it could be forming bonds with a different atom. The resonance structures represent the different instances in which the electron could be found and the bonds it could form. in the example below in any given instant the electron could be found forming a pi bond with one oxygen or the other.
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Katie Lam 1B
Posts: 52
Joined: Fri Sep 29, 2017 7:06 am

Re: Delocalized electrons

Postby Katie Lam 1B » Tue Nov 07, 2017 9:00 pm

Delocalization occurs when there is resonance. For example, if there are two resonance structures--one with a single bond between 2 atoms and one with a double bond between two atoms, there won't be exactly 2 or 4 electrons bonded in that area. The electrons aren't specifically associated with these bonds.

Sheel Shah 1H
Posts: 33
Joined: Fri Sep 29, 2017 7:04 am

Re: Delocalized electrons

Postby Sheel Shah 1H » Tue Nov 07, 2017 10:31 pm

Delocalized electrons are basically shared by the resonance molecule. For example in benzene, the electrons are shared EQUALLY within all 6 carbon atoms, allowing the molecule to attain its most stable structure.

David Zhou 1L
Posts: 61
Joined: Fri Sep 29, 2017 7:04 am

Re: Delocalized electrons

Postby David Zhou 1L » Sun Nov 12, 2017 3:48 pm

Does this mean that radicals can also have resonance structures, and thus have delocalized electrons?


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