Which of the following compounds will undergo self aldol condensation in the presence of cold dilute alkali ?

Options

A. `CH_(2)=CH-CHO`
B. `CH-=C-CHO`
C. `C_(6)H_(5)CHO`
D. `CH_(3)-CH_(2)CHO`

Answer

D

Explanation

Only those aldehyde undergoes aldol condensation which have `alpha`-hydrogen so `CH_(3)CH_(2)CHO` give this reaction because it contains `alpha`-hydrogen atom. Aldol condensation proceed in divided into two parts one is self aldol condensation and another is cross-aldol condensation. When both molecules are same called as self aldol and vice versa.