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Homework Help: Organic Chemistry: Alkenes

  1. Aug 21, 2009 #1
    1. The problem statement, all variables and given/known data

    An alkene


    reacts with H2 in the presence of Pt. What will the dominant product be?

    2. Relevant equations

    See below.

    3. The attempt at a solution

    Syn addition will occur, so the hydrogen atoms will either be in the front or in the back. One chiral center will result. One product will be notated as S and the other as R; thus, a racemic mixture will form?

    Thank you.
  2. jcsd
  3. Aug 31, 2009 #2
    Yes it is syn addition and 2H be added on the same face.So addition can take place from the top or from the bottom 50% chances of each . This will give you equal amount of RS and hence racemic mixture.
    Your answer is perfect.
    Last edited by a moderator: Aug 31, 2009
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