Stability Order of resonating structures

  • #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
 

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  • #2
mjc123
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How many electrons are in the valence shell of the Cl in III?
 
  • #3
How many electrons are in the valence shell of the Cl in III?
apparently 10how is that possibleit can hold at max 8 if I'm not wrong
 
  • #4
mjc123
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So III is not a permissible resonance structure according to the ordinary rules.
 

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