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Question

Which of the following will not perform iodoform reaction?

A
CH3COCH2CH3
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B
CH3CONH2
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C
C6H5COCH3
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D
CH3CHO
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Solution

The correct option is C CH3CONH2
CH3CO group is a must for Haloform reactions.

Compound with this group only can give Haloform reactions.

Acid or its derivatives like CH3CONH2, ester, anhydride do not give haloform test because they have resonance.

The amide group will interfere with the leaving of CHI3 and so, a positive test is not expected in this case.

Option B is correct.

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