2F3 part B (7th edition)

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

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2F3 part B (7th edition)

Postby 405112316 » Mon Nov 26, 2018 6:12 pm

The problem asks about the amount of sigma and pi bonds in the molecule SO2. The answer key gives two answers (2 sigma, 2 pi OR 2 sigma, 1 pi depending on resonance structure). It seems like the problem is considering the resonance structures as one double bond between the S and an O and two double bonds between the S and both Os. Calculating formal charges between the two resonance structures shows that the structure with two double bonds is clearly more stable. Why does the answer key give two answers then? Do we have to give both answers on the test as well?

Hanniel U 2B
Posts: 76
Joined: Fri Sep 28, 2018 12:16 am

Re: 2F3 part B (7th edition)

Postby Hanniel U 2B » Mon Nov 26, 2018 6:24 pm

I think we have to give both answers during the test. But make sure to clearly differentiate and state your answers when including resonance structures.

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