Question

Aldol condensation can not be observed in?

• A. Chloral
• B. Phenyl acetaldehyde
• C. Hexanal
• D. Ethanal

Answer 1

The correct option is A Chloral

Aldol condensation is a condensation reaction in which an enol or an enolate ion reacts with a carbonyl compound to form $\beta$-hydroxy aldehyde or $\beta$ hydroxyketone followed by dehydration to give a conjugated ene-one, this is not observed in chloral.
Chloral,$CC{l}_{3}CHO$ has no $\alpha$-hydrogen atom and hence does not undergo aldol condensation.