16.2a Pi Molecular Orbitals of 1,3 Butadiene | Organic Chemistry

Chad provides a comprehensive introduction to Pi Molecular Orbitals for conjugated systems. He begins with a review of the pi molecular orbitals of ethylene. He demonstrates how in-phase overlap leads to the formation of a lower energy bonding molecular orbital, while out-of-phase overlap creates a node resulting in the formation of a higher energy antibonding molecular orbital. Chad then applies these principles to draw the pi molecular orbitals of 1,3-butadiene, a conjugated diene. He shows its molecular orbital diagram including illustrations of all four pi molecular orbitals and identifies which are bonding and antibonding and highlights the Highest Occupied Molecular Orbital (HOMO) and the Lowest Unoccupied Molecular Orbital (LUMO), collectively referred to as the Frontier Molecular Orbitals. Chad also describes the pattern for the number of vertical nodes in each molecular orbital and the alternating pattern for which orbitals or symmetric and antisymmetric.
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00:00 Lesson Introduction
00:35 Review of the Pi Molecular Orbitals of Ethylene
10:30 Pi Molecular Orbitals of 1,3-Butadiene
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[@shubdip6069]

Your explanation of topic is very good and I like the connectivity that you had maintained with us during the video.🎉

[@ChadsPrep]

Thanks for saying so, Shubham.

[@EverythingRox]

Can't thank you enough! Awesome, understood everything in one go.

[@ChadsPrep]

Glad it helped, thanks for commenting!

[@nathanblank1742]

Gotta love how you accidently said nose but was still able to relate that to the lesson! That's true teaching talent right there haha

[@ChadsPrep]

Glad you liked the lesson Nathan :)

[@radwan3505]

the thing that i don't understand,which molecular orbital represents 1,3 butadiene is it pi one or pi two . in other words there are 2 electrons overlaping between all carbon atoms and other two between two carbons ? how does the molecule exist when it's not reacting is it in the form of pi one or pi two ?

[@user-ek5jf6se1b]

Great explanation!

[@ChadsPrep]

Thank you!

[@sciencenerd7639]

a very nice review

[@ChadsPrep]

Great!

[@charlesdarwin6142]

Cool video

[@ChadsPrep]

Thank you.

[@melissagonzalez7074]

You're the best!

[@ChadsPrep]

Thank you, Melissa!

[@user-sd7yg2wx7w]

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[@ChadsPrep]

Glad the video/channel is helping you.