IUPAC naming help

Discussion in 'DAT Discussions' started by shrister, 05.21.14.

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  1. shrister

    shrister 2+ Year Member

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    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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    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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    So it's prioritized by which substituent is more electronegative?
     
  5. shrister

    shrister 2+ Year Member

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    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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