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-   -   Cannizzaro reaction or Haloform reaction? (https://www.askmehelpdesk.com/showthread.php?t=689204)

  • Jul 31, 2012, 09:53 PM
    adianadiadi
    Cannizzaro reaction or Haloform reaction?
    Aldehydes without alpha hydrogens undergo Cannizzaro reaction in strongly alkaline conditions. However trihaloaldehydes undergo haloform reaction under the same conditions. I wonder what might be the reason?
  • Aug 1, 2012, 03:08 AM
    Unknown008
    Can you say what does the alkali do in this reaction?
  • Aug 1, 2012, 09:15 AM
    DrBob1
    Quote:
    Originally Posted by adianadiadi View Post
    Aldehydes without alpha hydrogens undergo Cannizzaro reaction in strongly alkaline conditions. However trihaloaldehydes undergo haloform reaction under the same conditions. I wonder what might be the reason?
    The trihalo substituent is a good leaving group and dominates further reactions progress.

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