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Superoxide and preoxide

  1. Dec 6, 2005 #1
    why the size of superoxide is lager than preoxide??
     
  2. jcsd
  3. Dec 6, 2005 #2

    Astronuc

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    Staff: Mentor

    See this for a brief discussion - http://en.wikipedia.org/wiki/Superoxide - but basically the superoxide radical O2- would produce a weaker bond than O22-. On the other hand superoxide only reacts/bonds with one cation (KO2), as opposed to two cations in the case of peroxide (e.g. H2O2).
     
  4. Dec 6, 2005 #3
    thanks a lots
     
  5. Dec 6, 2005 #4
    what is the meaning of this statement??
    "On the other hand superoxide only reacts/bonds with one cation (KO2), as opposed to two cations in the case of peroxide (e.g. H2O2)."
     
  6. Dec 8, 2005 #5

    Astronuc

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    Staff: Mentor

    The number of atoms would also determine the 'size' of a molecule, in addition to the bond 'lengths'. I was thinking of the original question - "why the size of superoxide is larger than peroxide".
     
  7. Dec 9, 2005 #6
    oxidation state of superoxide is -1/2, peroxide is -1. K and H are both +1 cations.
     
  8. Dec 9, 2005 #7
    i see. I get your point, thanks~!
     
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