Resonance structure

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Lorena Zhang 4E
Posts: 63
Joined: Fri Sep 28, 2018 12:16 am

Resonance structure

Postby Lorena Zhang 4E » Mon Nov 26, 2018 6:37 pm

For the molecules that have resonance structures, for example SO3 2-, how many sigma and pi bonds does it have?

ChathuriGunasekera1D
Posts: 78
Joined: Fri Sep 28, 2018 12:17 am

Re: Resonance structure

Postby ChathuriGunasekera1D » Mon Nov 26, 2018 7:31 pm

Hi! It should have the same number of sigma and pi bonds regardless of whether or not the molecule has resonance. Otherwise the structures would not be equal. Because SO3-2 has two single bonds and one double bond, here are three sigma bonds (one per single bond and one in the double bond) and one pi bond (one from the double bond).

Jonathan Pai 2I
Posts: 121
Joined: Fri Sep 28, 2018 12:27 am

Re: Resonance structure

Postby Jonathan Pai 2I » Mon Nov 26, 2018 7:33 pm

I believe Sigma and Pie bonds aren't meant to describe the actual thing, such as resonance being an average of the bond lengths, but instead describing how we describe bonded molecules as single, double, triple bonds.


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