IUPAC naming help

Discussion in 'DAT Discussions' started by shrister, May 21, 2014.

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  1. shrister

    shrister 2+ Year Member

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    Apr 21, 2013
    Why does OH take priority in numbering over chlorine? In the example I'm looking at on DAT Bootcamp, chlorine is at one end and alcohol is at the other, and chlorine is one bond away from a terminal carbon and alcohol is 2 bonds away from it's terminal carbon. I would assume I would start numbering with the carbon near the chlorine end but the answer is to start numbering chain closest to alcohol.
     
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  3. pilotdentist

    pilotdentist 2+ Year Member

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    Feb 26, 2014
    Columbus, OH
    One of the first Ochem videos for "Chad's Videos" outlines the functional group priority list. Bootcamp is correct, -OH is above halides in priority...
     
  4. shrister

    shrister 2+ Year Member

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    Apr 21, 2013
    So it's prioritized by which substituent is more electronegative?
     
  5. shrister

    shrister 2+ Year Member

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    Apr 21, 2013
    This definitely helped. Thanks! As for what I said about electronegativity, chad says that if you're stuck between which suffix to use, higher electronegativity helps. In the example I gave alcohol gets priority because it's the only functional group.
     

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