Phosphorus Pentachloride example from class

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Phosphorus Pentachloride example from class

Postby paytonm1H » Wed Oct 31, 2018 1:42 pm

Hi all!
In lecture this morning, Dr. Lavelle presented the example of phosphorus pentachloride for expanded valence shells. He wrote that the molecule's ten valence electrons' configuration is s2p6d2, using one d-orbital.
Wouldn't the two electrons in the d-orbital occupy two separate orbitals, instead of using one d-orbital? (Hund's Rule--electrons in the same sub shell occupy different orbitals with parallel spin). Why would they use only one orbital?

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Re: Phosphorus Pentachloride example from class

Postby Chem_Mod » Wed Oct 31, 2018 4:55 pm

I am referring to the orbitals used in bonding (two shared e- per orbital). This will make more sense after doing more bonding theory (hybridization).

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