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Question

Haloform reaction is not given by

A
CH3COCH3
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B
CH3COC2H5
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C
C6H5COC2H5
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D
CH3CH(OH)CH3
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Solution

The correct option is C C6H5COC2H5
The haloform reaction is a chemical reaction (where a haloform CHX3, where X is a halogen) is produced by the exhaustive halogenation of a methyl ketone (a molecule containing the RCOCH3 group) in the presence of a base. R may be alkyl or aryl. The reaction can be used to produce chloroform (CHCl3), bromoform (CHBr3) or iodoform (CHI3).

Substrates that successfully undergo the haloform reaction are methyl ketones and secondary alcohols oxidizable to methyl ketones, such as isopropanol. The only primary alcohol and aldehyde to undergo this reaction are ethanol and ethanal, respectively.

For haloform reaction, 3 hydrogens on alpha carbon are required.
Therefore, the compound C6H5COC2H5 cannot undergo haloform reaction.

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