Which one of the following is not formed by aldol condensation of a mixture of ethanal and propanal?
Which one of the following is not formed by aldol condensation of a mixture of ethanal and propanal?
2 - Methylpent-2-enal
But-2-enal
Pent-2-enal
Hex-3-enal
Solution
Hex-3-enal requires a larger aldehyde or ketone as one of the reactants to provide the necessary carbon chain length. Ethanal and propanal do not provide sufficient carbon atoms to form hex-3enal.