Homo/lumo

[MedPR]

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Reading the EK section about UV Spec.

UV Spec is based on the excitation of an electron from HOMO to LUMO, correct? When it gets excited, it then will emit a photon when it relaxes back to the HOMO level?

So LUMO is higher energy than HOMO.

Thanks

 

[milski]

Reading the EK section about UV Spec.

Yes.

UV Spec is based on the excitation of an electron from HOMO to LUMO, correct? When it gets excited, it then will emit a photon when it relaxes back to the HOMO level?

Yes.

So LUMO is higher energy than HOMO.

Thanks

Yes.

You're welcome. 😛

 

[MedPR]

Yes.



Yes.



Yes.

You're welcome. 😛

Thanks 🙂

 

[gettheleadout]

So the fact that we just skipped HOMO/LUMO in my organic II course bodes well, right?

 

[milski]

So the fact that we just skipped HOMO/LUMO in my organic II course bodes well, right?

Yes, you'll be fine, we skipped it too. We're not really doing any MO theory in my ochem class. It seems sort of pointless for the simple cases and way too hard for an intro class for the complex ones.

 

[chiddler]

i learned it in my gchem class. i don't think normal ochem classes do HOMO or LUMO material unless you're honors and go into more advanced electrocyclic reactions.

Part of the reason I passionately hated gchem at my school, by the way. We had to use 3d atomic modeling software and did some MO theory stuff. Did you guys do that too, or was it just my school?

 

[MedPR]

i learned it in my gchem class. i don't think normal ochem classes do HOMO or LUMO material unless you're honors and go into more advanced electrocyclic reactions.

Part of the reason I passionately hated gchem at my school, by the way. We had to use 3d atomic modeling software and did some MO theory stuff. Did you guys do that too, or was it just my school?

I remember doing it in my undergrad orgo a few years ago. I also remember ignoring it like the majority of the undergrad stuff I didn't understand immediately.

 

[mcloaf]

As I recall we did some more thorough HOMO/LUMO stuff when looking at aromaticity, though if you were to ask me about it now, I really couldn't tell you anything. Funny how that happens.