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Which of the following compounds is most...

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

A

`CH_(3)CHO`

B

`PhCOCH_(3)`

C

`PhCOPh`

D

`CH_(3)COCH_(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_(3)COCH_(3) lt CH_(3)CHO`
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