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Which of the following is most reactive ...

Which of the following is most reactive towards nucleophilic addition reactions ?

A

`CH_3CHO`

B

`PhCOCH_3`

C

PhCOPh

D

`CH_3COCH_3`

Text Solution

Verified by Experts

The correct Answer is:
A
In nucleophilic addition reaction of carbonyl compounds order of reactivity is

The lower reactivity of ketones over aldehydes is due to +I effect of the alkyl group. The aromatic aldehydes and ketones are less reactive than their aliphatic analogues. This is due to the +R effect of the benzene ring. From the above information, it is clear that increasing order of the nucleophilic addition reaction in the following compound will be
`PhCOPh lt PhCOCH_3 lt CH_3COCH_3 lt CH_3CHO`.
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