Formal Charge For Element In The Middle  [ENDORSED]


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Michelle Lee 2E
Posts: 64
Joined: Thu Jul 27, 2017 2:01 am

Formal Charge For Element In The Middle

Postby Michelle Lee 2E » Sun Nov 05, 2017 4:31 pm

We learned in Oct. 27th's lecture that when using formal charge, the best structure would be when the middle element has a 0 formal charge. Why is this? Also what if there is no 0 formal charge for the element in the middle of the lewis structure, or is it always possible to have an element in the middle of the lewis structure with a formal charge of 0?

Dr. Lavelle also mentioned something about electron affinity when talking about this. I couldn't hear what he said so how does electron affinity connect to this?

Kendall Schemmer 1I
Posts: 20
Joined: Fri Sep 29, 2017 6:03 am

Re: Formal Charge For Element In The Middle

Postby Kendall Schemmer 1I » Sun Nov 05, 2017 5:37 pm

To clarify, the best structure is when the entire molecule's overall charge is 0. It does not necessarily matter if it is the central atom or not.

Gobinder Pandher 3J
Posts: 21
Joined: Fri Sep 29, 2017 6:07 am

Re: Formal Charge For Element In The Middle

Postby Gobinder Pandher 3J » Sun Nov 05, 2017 8:35 pm

The central atom does not necessarily need to have a formal charge of 0. However, having the central atom have a formal charge of 0 will typically lead to an balanced/favored Lewis Structure.

Gurshaan Nagra 2F
Posts: 49
Joined: Thu Jul 27, 2017 2:01 am

Re: Formal Charge For Element In The Middle  [ENDORSED]

Postby Gurshaan Nagra 2F » Sun Nov 05, 2017 11:46 pm

Dr. Lavelle also mentioned that the formal charge and the molecule's overall charge should be equal.


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