Which of the following undergoes haloform rea | vedclass

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(D) The haloform reaction requires the presence of a methyl ketone group $(-COCH_3)$ or a group that can be converted into one,such as a secondary alc

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all the four

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(D) The haloform reaction requires the presence of a methyl ketone group $(-COCH_3)$ or a group that can be converted into one,such as a secondary alcohol $(-CH(OH)CH_3)$.In the presence of a base and halogen,the $\alpha$-hydrogens are replaced by halogen atoms to form a trihalo derivative $(-COCX_3)$.This intermediate then undergoes nucleophilic attack by $OH^-$,followed by the cleavage of the $C-C$ bond to release the haloform $(CHX_3)$.Compound $ (i) \ CH_3CH_2COCH_2Cl $ has $\alpha$-hydrogens on the $CH_2Cl$ group,which can be further halogenated to $COCCl_3$.Compound $ (ii) \ C_6H_5COCH_3 $ is a methyl ketone.Compound $ (iii) \ C_6H_5COCHCl_2 $ already has a dihalo group and can be further halogenated to $COCCl_3$.Compound $ (iv) \ CH_3CH_2COCCl_3 $ already contains the $COCCl_3$ group,which is the necessary intermediate for the haloform cleavage.Therefore,all four compounds can undergo the haloform reaction.

Which of the following undergoes haloform reaction?
$ (i) \ CH_3CH_2COCH_2Cl $
$ (ii) \ C_6H_5COCH_3 $
$ (iii) \ C_6H_5COCHCl_2 $
$ (iv) \ CH_3CH_2COCCl_3 $

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Which of the following undergoes haloform reaction?$ (i) \ CH_3CH_2COCH_2Cl $ $ (ii) \ C_6H_5COCH_3 $ $ (iii) \ C_6H_5COCHCl_2 $ $ (iv) \ CH_3CH_2COCCl_3 $