The increasing order of the reactivity of the following compounds in nucleophilic addition reaction is :

Question:

The increasing order of the reactivity of the following compounds in nucleophilic addition reaction is :

Propanal, Benzaldehyde, Propanone, Butanone

  1. Benzaldehyde $<$ Butanone $<$ Propanone $<$ Propanal

  2. Butanone $<$ Propanone $<$ Benzaldehyde $<$ Propanal

  3. Propanal $<$ Propanone $<$ Butanone $<$ Benzaldehyde

  4. Benzaldehyde $<$ Propanal $<$ Propanone $<$ Butanone

Correct Option: , 2

Solution:

Rate of Nucleophillic addition reaction is directly proportional to the $-I$ and $-M$ effect of the substituents present in the substrate. Ketones are less susceptible to the nucleophillic addition, due to the presence of alkyl (R) group which has +I effect. Thus reactivity order

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