Determining most stable Lewis structure

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Hannah Lee 2F
Posts: 117
Joined: Thu Jul 11, 2019 12:15 am

Determining most stable Lewis structure

Postby Hannah Lee 2F » Sat Nov 02, 2019 4:45 pm

When determining the most stable structure, does symmetry or formal charge come first?

For instance, for question 2B15) which asked to draw ClNO2, I mistakenly drew the Cl attached to the oxygen instead of the nitrogen, making an L-shape, because I thought that each atom's formal charge had to amount to zero. However, is symmetry more important?

Ethan Lam 4A
Posts: 69
Joined: Thu Jul 11, 2019 12:17 am

Re: Determining most stable Lewis structure

Postby Ethan Lam 4A » Sat Nov 02, 2019 4:48 pm

Symmetry and formal charge are equally important. In question 2B.15, they say that N is the central atom.

Catherine Daye 1L
Posts: 104
Joined: Wed Sep 11, 2019 12:16 am

Re: Determining most stable Lewis structure

Postby Catherine Daye 1L » Sat Nov 02, 2019 4:50 pm

Although they are both important, formal charge is slightly more important. Not all lewis structures will be symmetrical.

AnnikaMittelhauser4E
Posts: 50
Joined: Fri Aug 30, 2019 12:18 am

Re: Determining most stable Lewis structure

Postby AnnikaMittelhauser4E » Sat Nov 02, 2019 4:51 pm

The least electronegative atom (in this case, nitrogen) being the central atom is also important.

Karina Kong 2H
Posts: 98
Joined: Thu Jul 25, 2019 12:16 am

Re: Determining most stable Lewis structure

Postby Karina Kong 2H » Sat Nov 02, 2019 7:00 pm

In general they are both important. But regarding formal, you'd want to spread it out than have it condensed into one atom/side.

Kavee Dodampahala 4E
Posts: 51
Joined: Sat Jul 20, 2019 12:17 am

Re: Determining most stable Lewis structure

Postby Kavee Dodampahala 4E » Sat Nov 02, 2019 7:31 pm

Formal charge is the most important in determining the most stable structure.


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