Question

Compound does not have alpha hydrogen is ?

Answer 1

Explanation:

If a compound does not contain alpha hydrogen, why not show an aldol condensation reaction? ... In the first step of aldol condensation ( base catalysed ) the base comes and abstract the acidic hydrogen and form carbanion. If alpha hydrogen is not present then carbanion will not be formed and the reaction will not proceed.

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Answer 2

Carbonyl compounds which do not have alpha hydrogens can not form an enolate, they cannot undergo the aldol reaction.

Exampe: simplest aldehyde, methanal (formaldehyde) cannot undergo the aldol reaction

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