Replacing Halides with CN

  • Thread starter Huej
  • Start date
  • #1
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Main Question or Discussion Point

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?
 

Answers and Replies

  • #2
Borek
Mentor
28,303
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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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