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Replacing Halides with CN

  1. Mar 17, 2016 #1
    So if an alkyl halide reacts with KCN, the halide gets replaced with CN. But what if I was using a phenyl ring with two halides, Br and I attached, let's say, para to each other. If I react with KCN, do both halides get replaced, or would I need double moles of KCN to do that?
  2. jcsd
  3. Mar 17, 2016 #2


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    Staff: Mentor

    Regardless of everything else stoichiometry tells you you can't replace quantitatively TWO halides with ONE -CN.

    Phenyl hardly counts as an alkyl.
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