MO Diagrams for Heteronuclear Molecules

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Matthew Gutierrez 2D: Posts: 19; Joined: Fri Sep 25, 2015 3:00 am

MO Diagrams for Heteronuclear Molecules

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Postby Matthew Gutierrez 2D » Fri Oct 30, 2015 12:30 am

I am confused on why the textbook lists the order of MOs as: (1sigma)(2sigma*)(1pi)(3sigma)(2pi*)(4sigma*)

I thought that when given a heteronuclear molecule like CO, we would arrange electrons into the MOs like: (sigma2s)(sigma2s*)(pi2p)(sigma2p)...etc.

Which way is correct? And how would I know which MO energy levels to use for a heteronuclear molecule?

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