Pi bond

(Polar molecules, Non-polar molecules, etc.)

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Pi bond

Postby manasa933 » Thu Dec 07, 2017 6:05 pm

According to the VSEPR theory, does a pi bond have localized or de-localized electrons, and why?

Ishan Saha 1L
Posts: 60
Joined: Fri Sep 29, 2017 7:03 am

Re: Pi bond

Postby Ishan Saha 1L » Thu Dec 07, 2017 6:25 pm

it depends on whether the molecule has resonance structures or not. If the pi bond is in a molecule that has resonance, then it is delocalized. If it is in a molecule that does NOT have resonance such that the pi bond is between only two atoms, then it is localized. Hope this Helps!

Vincent Kim 2I
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Re: Pi bond

Postby Vincent Kim 2I » Thu Dec 07, 2017 10:46 pm

Essentially if it doesn't matter which atom specifically needs the double bond in the lewis structure, then there is delocalization. For example, benzene, a 6 Carbon ring with three double bonds has delocalized pi bonds because there it doesn't matter which 3 Carbons are double bonded together, so long as they are alternating between single bond and double bond.

Steven Chau 1B
Posts: 21
Joined: Fri Sep 29, 2017 7:07 am

Re: Pi bond

Postby Steven Chau 1B » Sat Dec 09, 2017 8:34 pm

Generally, the pi-bonds are delocalized if there is resonance since the pi-bond can be moved around without affecting the structure.

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