Pi bond

[manasa933]

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

[Ishan Saha 1L]

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]

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]

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