16.2b Pi Molecular Orbitals 1,3 Butadiene

[@ChrislynneGuron]

This is it. This was the video that cleared all my confusion. Thank you!

[@ChadsPrep]

Glad it was helpful!

[@bhoomireddyramadevi8506]

Explanation is very clear

[@RohitRaj-wz7xc]

Nice explanations. Satisfied with your work. Keep it up 👍👍👍

[@ChadsPrep]

Awesome Rohit! Will definitely do so!

[@__renaissance_man__]

Thanks for the vid, I have remained faithful to all your videos! All to say, I am not sure why in the question at the end you decided psi 3 vs psi 4. can you please elaborate?

[@rootuserjarvis]

Great explanation

[@ChadsPrep]

Thanks! Glad you found it helpful!

[@prasannag4628]

Thx.U explain really well

[@ChadsPrep]

You're welcome, Prasanna - glad it was helpful!

[@xinengoh195]

Thank you so much for this!! :)

[@ChadsPrep]

You're very welcome Xin! Glad you found it helpful!

[@nidhibhagwat6766]

Thank you for the explanation! Is there any significance for classifying the orbitals into symmetric and antisymmetric? Does it make a difference whether the symmetric or the antisymmetric orbital is filled?

[@ChadsPrep]

Hi Nidhi! Knowing if a molecular orbital will be symmetric and antisymmetric can be helpful in drawing them, but the greater significance of identifying molecular orbitals as symmetric and antisymmetric will be explained in the last half of this chapter when discussing pericyclic reactions (cycloadditions, electrocyclic rxns, and sigmatropic rearrangements). So you could say I was setting students up for the later lessons. The most important thing to understand for now is that the lowest energy molecular orbital is symmetric, and then they alternate as they increase in energy (symmetric-antisymmetric-symmetric-antisymmetric, etc). Understanding the symmetry of the molecular orbitals involved in these pericyclic reactions helps us predict which reactions happen more readily and certain aspects regarding stereochemistry in the products. But like I said, this will all become apparent in the latter half of the chapter. If you class has omitted pericyclic reactions (a few do) then the function of symmetry for you may just be in helping you draw the molecular orbitals. But there is a good chance that at the very least your class will cover Diels-Alder reactions and you'll see the relevance when Frontier Molecular Orbital Theory is discussed for Diels-Alder reactions. Hope this helps!

[@michelleelizabeth9956]

Thanks

[@ChadsPrep]

You're welcome

[@thebrwarrior]

i wish you were my teacher lol, thank for the lectures they helped me a lot!!!

[@ChadsPrep]

Glad you found them helpful! Best wishes in your Ochem course!

[@parasgulia1165]

Very helpful 👍👍

[@ChadsPrep]

Glad you found this helpful Paras!🙂

[@jalilnaibi2644]

i like the you speak. AWESOME

[@ChadsPrep]

Thank you Jalil! 😃

[@rafeedkhleif1597]

How do you do it for 1,2-butadiene?

[@ChadsPrep]

1,2-butadiene is not a conjugated system, but rather a cumulated system. You would treat each pi bond as a separate pi system, and the molecular orbitals for both would essentially look the same as that of ethylene. Hope this helps!

[@parisasalma4717]

Want some lectures on antarafacial and suprafacial

[@ChadsPrep]

Did you see the lectures later in this chapter (16.5d and 16.6) on Diels-Alder and Cycloaddition reactions in general? I cover it there! Happy Studying!

[@edan6646]

I think I love you

[@ChadsPrep]

Thanks!

[@bhavyashuagarwal7998]

sir my friend aishwariya likes your shining head

[@ChadsPrep]

Ha! Thanks for noticing!