Contributing to Resonance Structures

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MariahClark 2F
Posts: 60
Joined: Wed Nov 15, 2017 3:04 am

Contributing to Resonance Structures

Postby MariahClark 2F » Sun May 27, 2018 9:53 pm

What more makes a molecule contribute to a resonance structure other than just moving around the double or triple bonds in different place, because that is usually what I resort to. Is there more of a method to this? I've never quite fully understood.

Tarek Abushamma
Posts: 30
Joined: Fri Apr 06, 2018 11:01 am

Re: Contributing to Resonance Structures

Postby Tarek Abushamma » Sun May 27, 2018 10:25 pm

Whatever structure has the lowest energy state(such as the most favorable formal charge) contributes the most to resonance structure; so if all that separates equally low energy states is the position of a double bond, then showing all the alternate double bond positions would be the correct thing to do.

BriannaParrington-1B
Posts: 29
Joined: Fri Apr 06, 2018 11:04 am

Re: Contributing to Resonance Structures

Postby BriannaParrington-1B » Sun May 27, 2018 10:33 pm

Tarek Abushamma wrote:Whatever structure has the lowest energy state(such as the most favorable formal charge) contributes the most to resonance structure; so if all that separates equally low energy states is the position of a double bond, then showing all the alternate double bond positions would be the correct thing to do.

Is this the same concept as drawing the most stable Lewis structure?

Surya Palavali 1D
Posts: 24
Joined: Fri Apr 06, 2018 11:04 am

Re: Contributing to Resonance Structures

Postby Surya Palavali 1D » Sun May 27, 2018 10:38 pm

Yes, essentially. The most stable Lewis structure is always the one with the lowest energy.

MariaJohn1D
Posts: 50
Joined: Wed Nov 08, 2017 3:01 am

Re: Contributing to Resonance Structures

Postby MariaJohn1D » Fri Jun 08, 2018 9:48 pm

The molecule with the lowest formal charge is deemed as most stable and that would be the most favorable resonance structure.


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