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Homework Help: Product formed by the reaction

  1. Mar 15, 2015 #1
    Please see the attached picture. I'm not sure which hydrogen would be anti-periplanar. Any help would be appreciated. Thanks!

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  2. jcsd
  3. Mar 17, 2015 #2


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    You're really close. Think about the mechanism of the E2 elimination reaction. Which way does the 2-hydrogen need to be oriented relative to the 1-bromine for the elimination to occur? What does that do to the orientations of the groups in the final product?
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