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Nomenclature preference

  1. Jun 23, 2016 #1
    5-ethyl-4-methyloctane. Why can't we name this compound as
    4-ethyl-5-methyloctane?
     
  2. jcsd
  3. Jun 24, 2016 #2

    TeethWhitener

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    Practically, it makes no difference. Any chemist would know what molecule you're referring to. Technically (and I mean that in the worst possible way) the correct name according to IUPAC rules is 4-ethyl-5-methyloctane, because "ethyl" comes before "methyl" alphabetically, so "ethyl" gets a lower number assigned to it than "methyl".
     
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