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Question

In which of the following cases, Hoffmann product is the major product?

A
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B
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C
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D
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Solution

The correct options are
A
B
C
D

Hoffmann products i.e less substituted alkene can be possible when:

  1. There is a weak leaving group like F because in this case carbanion transition state is formed which results in less substituted alkene.
  2. Hoffman elimination for quaternary ammonium salts.
  3. When there is a large bulky base, as in this case it abstracts less hindered hydrogen which results in less substituted alkene.

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