FC and Octet Exceptions

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Shuyi Yu 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

FC and Octet Exceptions

Postby Shuyi Yu 1B » Tue Oct 30, 2018 10:53 pm

For different exceptions of the octet does the FC need to be fixed to zero or do the rules that the octet had overrule?

Brian Cook
Posts: 34
Joined: Fri Sep 28, 2018 12:15 am

Re: FC and Octet Exceptions

Postby Brian Cook » Wed Oct 31, 2018 12:45 am

Using the correct number of e- is most important, then you work on filling the octets. Elements row 3 and below can occupy more electrons than the octet since they have a hidden d block. Then you focus on reducing the formal charges by looking at double bonds you can create and moving lone pairs around to different elements.

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