### Stable Lewis Structures

Posted:

**Tue Oct 30, 2018 10:48 pm**When making Lewis Structures and deciding where to use double bonds how can we determine which version is more stable?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=31&t=35257

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Posted: **Tue Oct 30, 2018 10:48 pm**

When making Lewis Structures and deciding where to use double bonds how can we determine which version is more stable?

Posted: **Tue Oct 30, 2018 10:51 pm**

The Lewis structure version that has the more optimized combination of atoms with formal changes equal to 0 or as closest to 0 would be the more stable Lewis structure.

Posted: **Wed Oct 31, 2018 1:02 am**

I would test out all the different combinations of double bonds in the lewis structure (that match the number of electrons) and calculate the formal charge for each one. The formal charge closest to zero is the most stable.

Posted: **Wed Oct 31, 2018 1:12 am**

The structure that gives the most number of individual atoms a formal charge of 0 is the most stable. Ideally overall FC would be 0 too.

Posted: **Wed Oct 31, 2018 7:29 am**

Whichever structure gives the most possible atoms a formal charge of 0, or closest to 0!