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Reshav posted an Question
September 13, 2020 • 04:28 am 30 points
  • IIT JAM
  • Chemistry (CY)

Please tell me concept of how to compare resonance energy?

N 35) Which of the highest resonance energy in following (b) () Which of the highest resonance energy is following (a) (d) Stability of Intermediates

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  • Suman Kumar best-answer

    Q 36 option C is correct

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    More the benzenoid form more is the resonance energy

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    benzenoid form toh pta hai na

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    Priyanshu kumar Best Answer

    You find resonance energy per ring..for aromaticity

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    see this

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    For 35 option D is correct

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    Tetracene has highest resonance energy...more the ring more is the resonance energy

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    for ques 36 option C is correcr

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    got reshav ??

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    ques 36 me c aur d me kese check kiya

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    for aromaticity you find reshav Resonance energy per ring

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    for resonance energy only... generally more ring more RE

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    In 36 count number of double bonds...

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    In 3rd more double bond is there...so here C has more RE

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    now got this??

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    reshav kha doubt hai..pucho

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    sir isko sb jgh apply kr skte hai ki more the number of double bonds more will be the resonance energy

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    generally yhi concept chalta hai...kyunki ring increse hone pe..double bond bhi increases hote hai...so RE bhi increase hote hai

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    But always for aromaticity check RE per ring

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    db thik bnaye hai aur counting of db correct hai kya?

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    1st sahi hai....2nd aise bna lo

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    kyunki ye aromatic system hai...

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    14 pi electrons..kyunki isme middle wale db ko count nhi krte hai aromaticity me

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    please respond dear reshav

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    ok thankyou

  • Suman Kumar

    Q 35 option A is correct

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    35 ka to d hoga na

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    Just as in the previous case we compare heat of hydrogenation for 1 double bond

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    we see here also resonance energy per ring

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    book me to d diya hai 35 ka

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    sab tumhare samne hai. Now you decide

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    humne previous question me per double bond compare kar diya. Isme pata nahi

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    overall resonance energy d ka hi jyada hoga

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    not getting

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    overall resonance energy 'd' ka hi jyada hai

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    lekin humne your previous question me heat of hydrogenation compare kiya tha per double bond

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