Question

(CH3) 3C-CHO does not undergo aldol condensation .comment

Answer 1

Because it does not have alpha hydrogen atom

Answer 2

Answer: Because it does not have any tex]\alpha-H[/tex] atom.

Explanation:

Aldol condensation reaction is the reaction when two molecules of an aldehyde or a ketone combines to form a $\beta$ - hydroxy aldehyde or  $\beta$-hydroxy ketone, followed by the dehydration to give a conjugated alkene. This reaction is carried out in alkaline medium.

In its mechanism, the $OH^-$ takes the $\alpha-H$ making a negative charge on carbon atom, then rearrangement takes place and alkene attacks another aldehydic or ketonic group to form $\beta$ - hydroxy aldehyde or  $\beta$-hydroxy ketone.

As, in the given compound, there is no $\alpha-H$ present. Hence, it will not undergo aldol condensation reaction.

The mechanism is given below in the image attached.