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Can someone tell me what the HD+ ion is?

  1. Jun 12, 2009 #1
    I know [itex]H_2^+[/itex] is a bound state of an electron and two protons, but what's [itex]\text{HD}^+[/itex]? Is the D just a stand-in for an arbitrary nucleus that may, or may not, be a proton?

    I found the following website with information about this cation that leads me to believe that the "D" is not just a stand-in, since [itex]\text{HD}^+[/itex] seems to have a well defined molecular weight: http://webbook.nist.gov/cgi/cbook.cgi?ID=C12181167&Units=SI&Mask=1000#Diatomic
     
  2. jcsd
  3. Jun 12, 2009 #2

    Borek

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    Staff: Mentor

    D stands for deuterium (hydrogen isotope).
     
  4. Jun 12, 2009 #3
    Nice; thanks. So [itex]\text{HD}^+[/itex] consists of a bound state of a proton, a deuteron (one proton, one neutron), and an electron?
     
  5. Jun 12, 2009 #4

    Borek

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    Staff: Mentor

    Yes. It is just like H2+ - ionized hydrogen molecule - just with one hydrogen replaced by deuterium.
     
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