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Sourav posted an Question
August 26, 2020 • 20:52 pm 30 points
  • IIT JAM
  • Chemistry (CY)

The increasing order of the acidity of the hydrogen marked in bold italics among the following is a) ili

The increasing order of the acidity of the hydrogen marked in bold italics among the following is a) IlI

2 Answer(s) Answer Now
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    Dinesh khalmaniya 1

    option D

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    I and III are aromatic while II is antiaromatic

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    more the aromatic rings, less is the aromaticity

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    this is known as annelation effect

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    so I is more aromatic i.e., more stable than III and II is least due to antiaromaticity

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    check this video for annelation effect https://youtu.be/4G51MOznJnU

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    got it?

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    got it?

  • comment-profile-img>
    Priyanshu kumar best-answer

    Ist one is most acidic

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    Option D is correct

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    II is least acidic

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    In 1st after deprotonation aromatic ring is formed

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    In 2nd after deprotonation anti aromatic ring is formed...so least stable

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    got it Sourav???

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    what happens on 3

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    Cyclopentadiene anion is most acidic

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    In 3rd annelation effect

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    It decreases aromaticity

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    https://youtu.be/I99WYLvF5Zo check this video

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    see this

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