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Stability Order of resonating structures

  1. Jul 13, 2018 #1
    I have uploaded the picture of the structures cuz I couldnt figure out how to type.
    Its vinyl chloride.
    15314715716633361855743515196350.jpg
    According to me the order should be
    I>III>II
    because I has no charge so it must be most stable
    in II we have Cl an electronegative element bearing positive charge which makes it unstable.
    Hence I get the order.
    But the book says the order is I>II>III
    Please Help
     
  2. jcsd
  3. Jul 13, 2018 #2

    mjc123

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    How many electrons are in the valence shell of the Cl in III?
     
  4. Jul 15, 2018 at 7:44 AM #3
    apparently 10how is that possibleit can hold at max 8 if I'm not wrong
     
  5. Jul 16, 2018 at 3:25 AM #4

    mjc123

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    So III is not a permissible resonance structure according to the ordinary rules.
     
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