Expanded Octet and Resonance

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Manya Kidambi 3I
Posts: 31
Joined: Fri Sep 28, 2018 12:24 am

Expanded Octet and Resonance

Postby Manya Kidambi 3I » Sat Nov 10, 2018 5:08 pm

Can an atom without an expanded octet have resonance with more than 4 single bonds?

904914909
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Re: Expanded Octet and Resonance

Postby 904914909 » Sat Nov 10, 2018 5:11 pm

No, because having more than 4 single bonds would consist of an expanded octet. To have more than 4 single bonds the atom would have to be in the 3p block or higher.

Mariam Baghdasaryan 4F
Posts: 37
Joined: Fri Sep 28, 2018 12:29 am

Re: Expanded Octet and Resonance

Postby Mariam Baghdasaryan 4F » Sat Nov 10, 2018 5:18 pm

I don't think it can because if it has more than 4 single bonds, then that means the central atom has more than 8 valence electrons, already suggesting an expanded octet. The resonance structures also have to reflect this. If an atom does not have a d-orbital or f-orbital for more electrons, it can't have more than 4 bonds.


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