Drawing resonance structures?

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NatBrown1I
Posts: 62
Joined: Fri Sep 28, 2018 12:17 am

Drawing resonance structures?

Postby NatBrown1I » Sun Nov 11, 2018 9:30 pm

On tests will we be required to draw all possible resonance structures (like in IB) for a question that asks for a drawing of a structure that has resonance?

Lily Benitez 2G
Posts: 63
Joined: Fri Sep 28, 2018 12:29 am

Re: Drawing resonance structures?

Postby Lily Benitez 2G » Sun Nov 11, 2018 9:34 pm

When asking for a structure they are usually looking for the one that is most stable. If the compound is neutral you will draw the one with an overall charge of zero. You can identify the charge by using formal charge.

Luc Lorain 1L
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

Re: Drawing resonance structures?

Postby Luc Lorain 1L » Sun Nov 11, 2018 10:13 pm

I think that if there is a single compound with multiple resonance structures that are equally stable (example, the different resonance structures of benzene, C6H6), you should draw all possible Lewis structures with the arrow notation in between. If there is a single most stable Lewis structure, however, that one should be the single correct answer.

Riley Dean 2D
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: Drawing resonance structures?

Postby Riley Dean 2D » Tue Nov 13, 2018 11:00 am

If it is a structure where you can change where the double bonds go while keeping the charges the same except for the molecules that you shifted the bond between, then draw the resonance structures and the double arrows between them because the most stable structure is a mixture of the resonance structures

Yvonne Du
Posts: 64
Joined: Fri Sep 28, 2018 12:23 am

Re: Drawing resonance structures?

Postby Yvonne Du » Tue Nov 13, 2018 12:55 pm

The resonance structures should be equally stable. However, the Lewis structure for this specific compound does not represent its real appearance because a compound that has resonance structures actually have the resonance bond constantly changing from atom to atom, so that is why we said we can have multiple structures because the bond does not belong to one of the atoms permanently.

Nicklas_Wright_1A
Posts: 60
Joined: Fri Sep 28, 2018 12:23 am

Re: Drawing resonance structures?

Postby Nicklas_Wright_1A » Tue Nov 20, 2018 11:26 am

A test would usually tell you to either draw all resonance structures or just one of the resonance structures.

305127455
Posts: 30
Joined: Fri Sep 28, 2018 12:16 am

Re: Drawing resonance structures?

Postby 305127455 » Sun Nov 25, 2018 7:33 pm

I thinks the question will instruct you if it does want to test your understanding of resonance structure. Otherwise, just leave it.


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