Simun Mishra posted an Question
August 31, 2020 • 16:35 pm 30 points
  • IIT JAM
  • Chemistry (CY)

Can u pls explain me this mechanism ?

2 Answer(s) Answer Now
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  • Suman Kumar best-answer

    SeO2 is an oxidizing agent. https://youtu.be/_bnctC6Bo9Y

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    Dinesh khalmaniya 1 Best Answer

    where do you have doubt??

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    sir what is ene reaction

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    wait..

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    ok sir

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    The ene reaction is a chemical reaction between an alkene with an allylic hydrogen and a compound containing a multiple bond, in order to form a new σ-bond with migration of the ene double bond and 1,5 hydrogen shift. The product is a substituted alkene with the double bond shifted to the allylic position. 

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    ene reaction takes place between compounds having double bonds such as alkene, carbonyl, O2 etc with allylic H

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    their is some network issues sir I will reply and ask about it after some time sorry for this sir

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    sir how here 1.5 Hydrogen shift occurs can u pls explain me this by image

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    check it

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    yes sir

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    and sir what is 2.3 sigmatropic rearrangment

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    ??

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    it is 2,3 sigmatropic

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    I can't understand this sir

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    how it happens and why it is 2.3 sigmatropic

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    wait ypu need it in details. actually it is the part of pericyclic reaction. do you have notes??

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    first need to study pericyclic reaction to understand concept

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    no sir

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    okay then I'll send you notes

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    ok sir

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    https://youtu.be/Upi8UJgwnPo

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    check above vide to understand concept of sigmatropic shift

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    ok sir

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    sir in this video their in no 2.3sigmatropic rearrangment

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    sorry i didn't check wait..

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    ok sir

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    check next part

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    https://youtu.be/XdQiGcMzJ8o

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    ok sir

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    sir can u pls send me mechanism of this reaction

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    yes, I'll send you later.

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    ok sir

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    check it

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    how to sift H here sir here 2 allylic and 1 benzylic H present na sir

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    sir this is also a Allylic c na why u can take H from here ?

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    here we take most acidic H.

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    because H transfer in ene reaction

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    but sir how to know which H will transfer

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    sir how to know which H will be trasfer

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    wait simun I'm checking this concept again. I'll inform you once get it. actually I'm busy so can't be focused it.😊

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    ok sir

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    check it simun and compair the both case

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    I can't get it sir

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    in Ist case negative charge is destabilize by +I effect of C2H5 while in 2nd case it is destabilize by CH3. so in case 2nd negative charge is more stable than 1st

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    so H removed from more substituted allylic position

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    ok sir

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    ok sir

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