Aldehydes, Ketones And Carboxylic Acids

Question

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions:
Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.

Solution

The +I effect is more in ketone than in aldehyde. Hence, acetphenone is the least reactive in nucleophilic addition reaction. Among aldehyde, the +l effects is the highest in p-tolualdehyde because of the presence of the electron donating –CH₃ group and the lowest in p-nitro bezaldehyde because of the presence of the electron withdrawing –NO₂ group. Hence, the increasing order of the reactivates of the given as;

Acetophenone < p-Tolualdehyde < Benzaldehyde < p-Nitrobenzaldehyde.

Some More Questions From Aldehydes, Ketones and Carboxylic Acids Chapter

Write the structures of the following reactions:

Write the structures of products of the following reactions:

Arrange the following compounds in increasing order of their boiling points:
CH₃CHO, CH₃CH₂OH, CH₃OCH₃, CH₃CH₂CH₃.

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions:
Ethanal, Propanal, Propanone, Butanone.