octet expansion

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Roni Touboul
Posts: 31
Joined: Thu Sep 27, 2018 11:24 pm

octet expansion

Postby Roni Touboul » Wed Nov 21, 2018 12:42 pm

what does it mean when lavelle said "octet expansion involves d-oribtals"?

Hai-Lin Yeh 1J
Posts: 47
Joined: Thu Sep 27, 2018 11:16 pm
Been upvoted: 1 time

Re: octet expansion

Postby Hai-Lin Yeh 1J » Wed Nov 21, 2018 1:31 pm

The reason to the octet expansion involving d-orbitals is because if n=2, the second row of the periodic table, the electron configuration would only be s2p6, which involves no d-orbitals, therefore, aren't allowed for octet expansion. On the other hand, if n=3, you can recall that l would equal to 0, 1, and 2 and that corresponds to s, p, and d orbitals respectively. Thus, if n=3, d-orbital exists. Therefore, elements in the third row will allow for octet expansion because the d-sublevel can accommodate more bonding with other atoms whereas the n=2 does not have a d-sublevel, which means it cannot be expanded.

Millicent Navarro 1I
Posts: 37
Joined: Thu Sep 27, 2018 11:25 pm

Re: octet expansion

Postby Millicent Navarro 1I » Sat Nov 24, 2018 9:59 pm

A quick way to think of the "octet expansion involving d-orbitals": Elements that would be considered to have an expanded octet are those in period 3 and beyond because these specific elements can/are able to hold electrons in the d-orbital shell.

Hope this helps.

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