Drawing resonance structure for SO42

  • #1
Sunwoo Bae
59
4
Homework Statement:
Draw the important resonance forms for SO42-
Relevant Equations:
none
I was told that there are six resonance structures for SO42-, as shown below.

1612005103934.png


I am wondering why this structure with single bonds is not one of the possible resonance.
I understand that it is unfavorable as the formal charges are spread out over all four atoms, but shouldn't is still be a part of the resonance, given that the total formal charge of the molecule adds up to 2- in total?

1612005230638.png


Thank you
 
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Answers and Replies

  • #2
mjc123
Science Advisor
Homework Helper
1,282
688
Theoretically that is a possible resonance structure, but that degree of charge separation makes it much less stable than the other structures, so it contributes very little to the resonance hybrid.
 

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