When would a compound not have FC=0?


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MKearney_4G
Posts: 50
Joined: Fri Aug 30, 2019 12:18 am

When would a compound not have FC=0?

Postby MKearney_4G » Tue Oct 29, 2019 4:03 pm

Like the title says, what would the conditions have to be for a formal charge to be greater than or less than 0?

Parker Smith
Posts: 102
Joined: Thu Jul 25, 2019 12:15 am

Re: When would a compound not have FC=0?

Postby Parker Smith » Tue Oct 29, 2019 5:51 pm

If a compound has a charge, one or more of the atoms involved will have a formal charge not equalling 0. That being said, if this case scenario is encountered, make sure the charged atoms are energy stable. For example, If you have SO3 2 minus, the negative formal charges should be on the oxygens, since their electronegativity allows them to maintain stability while having a negative formal charge.

Jessica Li 4F
Posts: 115
Joined: Fri Aug 09, 2019 12:16 am

Re: When would a compound not have FC=0?

Postby Jessica Li 4F » Wed Oct 30, 2019 6:37 pm

It would be when the compound itself is charged/a polyatomic ion.To add on to the previous answer, since SO32- has a 2- charge overall already, the formal charges (if correctly calculated) should also come out to -2.


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