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Got stuck on molecular structure

  1. Nov 22, 2012 #1
    The S molecule of SO2 forms a double bond with one O and dative covalent bond with another O
    Meanwhile,XeO4 is a molecule which Xe forms a double bond with each O
    I have a question here
    Why doesnt that S forms 2 double bonds with O to extend its octet structure?
    Similarly,why doesnt that Xe form 4 dative covalent bond with O to maintain its octet structure?
     
  2. jcsd
  3. Nov 22, 2012 #2

    DrDu

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    Neither sulfur nor xenon extend their octet in these compounds and a distinction between double bonded and dative bonded oxygens is purely fictive.
     
  4. Nov 22, 2012 #3
    why do u say that "Neither sulfur nor xenon extend their octet in these compounds"
    if i draw the electron diagram of Xe,i count there should be 16 outermost electrons around Xe?
     
  5. Nov 22, 2012 #4

    DrDu

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  6. Nov 22, 2012 #5
  7. Nov 22, 2012 #6
    but can i explain like this:
    since electrons are indistinguishable,and they all move randomly around the atoms
    so it is indistinguishable whether it is dative or pure covalent?
     
  8. Nov 23, 2012 #7

    DrDu

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