Finding a Lewis Structure with the Lowest Energy

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KC Navarro_1H
Posts: 33
Joined: Fri Apr 06, 2018 11:04 am

Finding a Lewis Structure with the Lowest Energy

Postby KC Navarro_1H » Thu May 17, 2018 10:00 am

I understand how to create Lewis Structures, though I was wondering if there were any quick methods to find the Lewis Structure with the lowest energy. Is it a matter of trial and error, where you calculate the formal charge each time, or are there some factors that we need to look out for to ensure that we have the lowest energy?

kimberlysanchez-1E
Posts: 30
Joined: Tue Nov 14, 2017 3:01 am

Re: Finding a Lewis Structure with the Lowest Energy

Postby kimberlysanchez-1E » Thu May 17, 2018 11:01 am

i think its just trial and error

kendallbottrell
Posts: 31
Joined: Fri Apr 06, 2018 11:02 am

Re: Finding a Lewis Structure with the Lowest Energy

Postby kendallbottrell » Thu May 17, 2018 1:47 pm

Typically I bond the elements together and then distribute the electrons and then calculate the formal charges. If the formal charges are not close enough to zero, I redistribute some electrons between the elements in the form of bonds (double, triple, etc). And then recalculate the formal charges.

Celeste Martinez 1K
Posts: 31
Joined: Fri Apr 06, 2018 11:04 am
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Re: Finding a Lewis Structure with the Lowest Energy

Postby Celeste Martinez 1K » Thu May 17, 2018 7:31 pm

What I do is make sure that every atom satisfies the octet rule and then calculate the formal charge, so I guess you can say it's mostly trial and error.

Hope this helped!

Mariah Guerrero 1J
Posts: 32
Joined: Fri Apr 06, 2018 11:03 am

Re: Finding a Lewis Structure with the Lowest Energy

Postby Mariah Guerrero 1J » Thu May 17, 2018 9:48 pm

Just to clarify, lowest energy means that the molecule has a formal charge of 0 (or close to 0), right?

KC Navarro_1H
Posts: 33
Joined: Fri Apr 06, 2018 11:04 am

Re: Finding a Lewis Structure with the Lowest Energy

Postby KC Navarro_1H » Fri May 18, 2018 10:55 am

Yes, lowest energy means the structure that has a formal charge that's closest to zero. Thank you for all your responses!!


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