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Sundaram Singh Rajpoot posted an Question
December 26, 2020 • 16:22 pm 35 points
  • IIT JAM
  • Chemistry (CY)

1. arrange the following resonating structures in the order of decreasing order of stability ch,= ch-cl ch-ch= cl ch-ch = ci° (a) i>il>ii (b) ii>i>iii (c)1>ii>

1. Arrange the following resonating structures in the order of decreasing order of stability CH,= CH-Cl CH-CH= Cl CH-CH = CI° (a) I>Il>II (b) II>I>III (c)1>II> III (d) IIl>II>I

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    Priyanshu kumar

    Option A I>III>II

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    Ist one is more stable as no charge separation

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    2nd and 3rd there is charge separation but there is similar i.e negative charge on both carbon and chlorine in 2nd one so less stable than 3rd one

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    got this sundaram?

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    is 2Nd structure right

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    yes 2nd is least stable

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    on cl should be positive charge

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    No that resonating structure is more stable in which electronegative atom contain negative charge..but due to little bit repulsion in case of 2nd one ...similar charges

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    Dinesh khalmaniya 1

    option A fisr uncharged is most stable. now in case of charge species, make sure that + ve charge must be present on less EN atom and -Ve charge on more EN atom

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    reason

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    got it

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