Determining Resonance

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Reagan Smith 1H
Posts: 50
Joined: Sat Jul 20, 2019 12:16 am

Determining Resonance

Postby Reagan Smith 1H » Sun Oct 27, 2019 3:51 pm

How do you determine which resonance structure is the most stable?

Haley Fredricks 1B
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Joined: Sat Aug 24, 2019 12:16 am
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Re: Determining Resonance

Postby Haley Fredricks 1B » Sun Oct 27, 2019 3:57 pm

By determining the formal charges on each of the atoms in each variation you can see if one is more stable than others (0 is the most stable).

Kyle Thorin
Posts: 50
Joined: Sat Aug 24, 2019 12:16 am

Re: Determining Resonance

Postby Kyle Thorin » Sun Oct 27, 2019 4:11 pm

The Lewis Structure with the formal charge closest to 0 is the most stable

Angus Wu_4G
Posts: 102
Joined: Fri Aug 02, 2019 12:15 am

Re: Determining Resonance

Postby Angus Wu_4G » Sun Oct 27, 2019 4:13 pm

If you cannot avoid assigning a negative formal charge to an atom, then always draw your structures so that the most electronegative element has the negative formal charge. Ideally though you would want every atom to have zero formal charge, but there are times when that is impossible to achieve.

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