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Resonance Structures

Posted: Sun Oct 29, 2017 10:46 pm
by Tim Foster 2A
How do we draw a representation of a resonance structure? Is it just a combination of all possible configurations?

Re: Resonance Structures

Posted: Sun Oct 29, 2017 10:59 pm
by Clement Ng
You draw a resonance structure by drawing all the possible structures and arrows that show that the molecule oscillate between the different lewis diagrams.

Re: Resonance Structures  [ENDORSED]

Posted: Sun Oct 29, 2017 11:04 pm
by Julian Krzysiak 2K
A resonance structure would just be the Lewis structure of all the possible configurations of the bonds in a molecule. This is signified by a double arrow between each possible Lewis structure, showing the possible resonance structures of the molecule. But the best representation of a molecule would be the resonance hybrid, which is the blending (average) of all the resonance structures. And this is shown by adding dotted lines where other resonance bonds would be in the same structure (make sure when adding the resonance bonds, to also change the e- configuration to match the bond.) And so, we have the best representation of a molecule, the resonance hybrid, by combining the resonance structures together.

Re: Resonance Structures

Posted: Sun Nov 05, 2017 4:25 pm
by Michelle Lee 2E
I agree with the two responses given.
Would the resonance structure be wrong if one of the forms of the Lewis Structure was missing and we didn't go back to check that it was missing? Also, Formal Charge allows us to figure out the best or closest model/structure to the actual structure (to my knowledge). Which would be a better representation, a formal charge analysis for the best lewis structure or a resonance structure? Or are they the same?