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Ganesh posted an Question
June 04, 2021 • 13:51 pm 30 points
  • IIT JAM
  • Chemistry (CY)

How could we calculate number of alfa hydrogens in this compound. ?

how could we calculate number of alfa hydrogens in this compound. ?

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    Priyanshu kumar

    what's your doubt?

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    how could we calculate alfa hydrogens in the above compound ... that is my doubt sir

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    ok wait explaining

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    ganesh at ortho and para position ch3 group show hyperconjugation effect and at meta position hyperconjugation doesn't works only inductive effect works... so here due to hyperconjugation at para position it has 3 alpha hydrogen

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    got this?

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    yes sir thank you

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    Dinesh khalmaniya 1 best-answer

    if CH3 group is attached at ortho and para position of benzylic carbocation then it shows +H effect and we can count number of alpha H of alkyl group attached to ortho and Para position. in this case -CH3 group is present at para so it has 3 alpha H

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    about meta position sir

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    resonance and hyperconjugation don't work at meta position so no need to calculate alpha H we will check only inductive effect at meta position

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