Choose the best combination of pair of compounds that undergo aldol condensation followed by dehydration to produce but- 2 -enal.

Question

Choose the best combination of pair of compounds that undergo aldol condensation followed by dehydration to produce but- 2 -enal. (A) Methanal and ethanal (B) Two moles of ethanal (C) Methanal and propanone (D) Ethanal and propanone

Tardigrade Admin · Accepted Answer

The carbonyl compounds with alpha hydrogen undergoes aldol condensation reaction in the presence of base. The product of aldol condensation is

α, β -

unsaturated carbonyl compounds.
The product given is

(C H)_{3} C H = C H - C H O (b u t - 2 - e na l)

From the structure it is observed that two moles of ethanal are involved in the reaction.

Q. Choose the best combination of pair of compounds that undergo aldol condensation followed by dehydration to produce but- 2 -enal.

Methanal and ethanal

Two moles of ethanal

Methanal and propanone

Ethanal and propanone

Q. Choose the best combination of pair of compounds that undergo aldol condensation followed by dehydration to produce but- $2$ -enal.