Which of the following compound(s) cannot undergo aldol condensation ?
A
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B
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C
HCHO
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D
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Solution
The correct option is D An aldol condensation is a reaction in which an enol or an enolate ion reacts with a carbonyl compound to form a β-hydroxyketone (an aldol reaction), followed by dehydration to give a conjugated enone.
Carbonyl compounds that contain α−hydrogen can undergo aldol condensation in the presence of dilute base as NaOHorKOH
Compounds (b) , (c) and (d) do not have α−hydrogen so they won't undergo aldol condensation reaction.