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Charged vs polar species

  1. Mar 21, 2013 #1
    Hi,
    Is it correctly understood that all charged molecules are polar (if they have a charge at some point, they must also have a unequal distribution of positivity and negativity)

    but polar molecules can be charged or uncharged ( they have Δelectronegativity)
     
  2. jcsd
  3. Mar 21, 2013 #2

    DrClaude

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    Staff: Mentor

    You have to take into account symmetry. I'm pretty sure that H2+ is non-polar!
     
  4. Mar 21, 2013 #3
    Ahh yes that makes sense! thank you :)
    So in the case of H2(+) I could imagine there are (if one can say) two resonance form, where 50% of the time the electron is most at Hydrogen A and the other 50% most at hydrogen B.
     
  5. Mar 21, 2013 #4

    DrClaude

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    Staff: Mentor

    In a simple classical picture, yes. Quantum mechanically, you just have to see the electron as being in an orbital that stretches symetrically over the two hydrogen nuclei.
     
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