Expanded Octet Max

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Michelle Pham_3H
Posts: 26
Joined: Fri Sep 29, 2017 7:07 am

Expanded Octet Max

Postby Michelle Pham_3H » Sun Nov 05, 2017 5:32 pm

We discussed in lecture how P, S, and CL can all have expanded octets due to their size and vacant d-orbitals. Is there a maximum amount of electrons that their expanded octets can accommodate? And if not, would we just draw our Lewis structures according to formal charge and knowledge that these elements can accommodate more than 8 electrons? Thanks in advance!

Rucha Kulkarni 2A
Posts: 43
Joined: Fri Sep 29, 2017 7:05 am

Re: Expanded Octet Max

Postby Rucha Kulkarni 2A » Sun Nov 05, 2017 6:09 pm

I'm not sure about the second question, but I don't think there's a maximum number of bonds in expanded octet? Because it just depends on the next available empty orbital.
Sorry I couldn't answer the other question!

Rachel Lu_dis1H
Posts: 66
Joined: Fri Sep 29, 2017 7:06 am
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Re: Expanded Octet Max

Postby Rachel Lu_dis1H » Sun Nov 05, 2017 7:56 pm

There's not necessarily a max expanded octet but it can go very high like in Cl04^- the Cl has 7 bonds. If you continue doing more problems you'll get more intuition for drawing Lewis structures. You can try drawing the Lewis structures according to formal charge to make the central atom's formal charge equal 0, but you should still check the other atom's formal charges in case there can be a more stable Lewis structure.


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