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Bond enthalpy periodic trend?

  1. Apr 20, 2017 #1
    Is there a period trend for bond enthalpy? Specifically Atom-Hydrogen bonds. Need to find a trend in predicting the bond enthalpy of several atom-hydrogen bonds I calculated using gaussian.

    Any help would be appreciated, thanks!
     
  2. jcsd
  3. Apr 21, 2017 #2

    TeethWhitener

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    If you calculated the bond enthalpies, wouldn't you be in a better position to tell us the trend, rather than us telling you?
     
  4. Apr 21, 2017 #3
    I just wondered if there was supposed to be a trend since they don't appear to follow any pattern.
     
  5. Apr 22, 2017 at 2:43 PM #4
    Try this table. https://labs.chem.ucsb.edu/zakarian/armen/11---bonddissociationenergy.pdf

    For maingroup elements, E-H BDE's are fairly predictable: decrease down the periodic table, and increase across the periodic table.
    For transition metals, M-H BDE's increase down the periodic table (1st < 2nd < 3rd). There's not really a clear trend across the periodic table.
     
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