Sigmatropic shift: Basic Concept

[@kaushikumarihami1982]

Amazing! Amazing! Amazing!! no one can do better than you. You simply nailed it!!! NO words!!! Extremely helpful.

[@liamj31415]

Thank you very much Sir, i have been struggling with this concept for a long time, this has been really helpful, God bless you Sir

[@ChemWis]

I'm glad it was helpful!

[@roktimtanvir3553]

In 14:19 sec, you have written that the homo of ethene is thermally asymmetric... But it's symmetric. Plz explain

[@sayyedizazyousafzai8112]

sir 1,3 shift is photochemically allowed

[@maiti9894]

Sir,what is the HOMO for allylic radical (●C3H5) in photochemical condition ?Is it ¥3 ,ie 3unpaired electron in 3 MO,?I can't understand symmetry of HOMO for this radical in{1,3} shift in photochemical condition,, please sir explain it.

[@ChemWis]

Yes, under photochemical condition, due to electronic excitation to Psi-3, it becomes HOMO that has plane of symmetry. For more details about how to make Huckel molecular orbital diagram along with some tricks please visit to my another video the link of which is given below:
th-cam.com/video/DfvNxbfAlZg/w-d-xo.html

[@Muhammadislahmedia]

th-cam.com/video/8_yUZHh3Y94/w-d-xo.html

[@neetalonkar5175]

Thanks sir

[@sayyedizazyousafzai8112]

great sir

[@amanadleshorts7429]

Excellent sir👌👌

[@ChemWis]

Thanks and welcome

[@Muhammadislahmedia]

th-cam.com/video/8_yUZHh3Y94/w-d-xo.html

[@heramb575]

Sir at 6:10 how does one know that it is feasible or not?

[@ChemWis]

The [1,3]-migration of hydrogen is antarafacial under thermal condition involving a transition state which is very strained (unstable). Because of that it is not feasible thermally.

[@karthikkd3471]

@@ChemWis So it is feasible in photochemical condition isn't it🤔

[@maiti9894]

Thanks sir,I expect more from you.

[@Muhammadislahmedia]

th-cam.com/video/8_yUZHh3Y94/w-d-xo.html

[@MaestrowithRavina]

sir i didn't understand in 1,3 shift,allylic carbon has only 2 pi electrons or 1 double bond it means it it chi1 in homo thermal cond so how t has node and c2 symmetry

[@ChemWis]

Dear Ravina, Thank you for watching this video. For the explanation it is assumed that the reaction is passing through the allyl radical. In allyl radical there are 3 pi electrons distributed over 3 carbon atoms. Under thermal condition Psi 2 will be HOMO with C2 symmetry.

[@MaestrowithRavina]

@@ChemWis thank u so much

[@ДадахонУрмонов-ю8ъ]

Thank you so much

[@ChemWis]

You're most welcome

[@lole6424]

thank you man

[@ghadeerahmed3318]

Thank you kindly.

[@ChemWis]

Welcome!

[@anushka4828]

Thank you sir

[@abdeltawabali1872]

Thank you for this excellent discussion

[@ChemWis]

Welcome

[@thejaswinikn8674]

Thank you sir
U explained well 👌

[@abdulkalamazad7931]

understood clearly