Karnan posted an Question
August 30, 2020 • 04:23 am 30 points
  • IIT JAM
  • Chemistry (CY)

9 stubi9by osdo of stabi9ty

9 Stubi9by Osdo of Stabi9ty 8uh8uh8yf7tv8uh8yfutv87tcyg5fuh

3 Answer(s) Answer Now
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    Priyanshu kumar best-answer

    In structure (III) methyl group is attached at one end of double bond which imparts stability to it. Therefore (III) is most stable. Structure (II) also has extra stability due to aromatic cyclopropene ring, but methyl group is not attached directly to doubly bonded carbon, therefore it is less stable than (III). Least stable is (I) as the double bond is present outside the ring and no alkyl group is attached to impart extra stability to it.

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    So stability order III >II>I

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    Cyclopropene ring possess aromatic character ...So it is more stable...hence 1st is least stable...

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    got it dear aswin??

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    Sir, but in key different. I think here is exception. I got this from YouTube lecture. so please clarify

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    what is given in your key??

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    Dinesh khalmaniya 1 best-answer

    hope this will help you 🙏🙏

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    Sir, this is not right answer

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    this is an exceptional case

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    i solved it according to concept. btw what's the correct answer

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    may be another concept used

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    II>III>I ???

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