Which of the following does NOT exhibit haloform reaction?

Step-by-step solution

Haloform Reaction Analysis Compounds exhibiting the haloform reaction contain the methyl ketone group CH₃CO- or are oxidizable to this structure (e.g., CH₃CH(OH)R ). Ethanal ( CH₃CHO ) contains the CH₃CO- moiety and undergoes haloform reaction. Propanone ( CH₃COCH₃ ) is a methyl ketone with two CH₃CO- groups and exhibits the reaction. Butanone ( CH₃COCH₂CH₃ ) contains the CH₃CO- moiety and undergoes haloform reaction. Propanal ( CH₃CH₂CHO ) lacks the CH₃CO- moiety, possessing instead CH₃CH₂CO- , and does not exhibi