Shweta Thakur posted an Question
February 10, 2021 • 17:42 pm 30 points
  • IIT JAM
  • Chemistry (CY)

Why in acidic medium the halogenation of aldehydes and ketones stops after introduction of one halogen atom

why in acidic medium the halogenation of aldehydes and ketones stops after introduction of one halogen atom

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    Dinesh khalmaniya 1 Best Answer

    In acidic solution, usually only one alpha hydrogen is replaced by a halogen, because each successive halogenation is slower than the first. The halogen decreases the basicity of the carbonyl oxygen, thus making protonation less favorable.

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    but sir what about in the case of base in the base there is all removal of hydrogen

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    sorry sir I got it in the acid there is a formation of carbon cation and in the base there is a no formation of carbocation

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