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

Question

Which of the following compounds will undergo self aldol condensation in the presence of cold dilute alkali? (A) CH2 = CH-CHO (B) CH ≡ C - CHO (C) C6 H5 CHO (D) CH3 =CH2 CHO

Tardigrade Admin · Accepted Answer

Only those aldehyde undergoes aldol condensation which have α-hydrogen, so CH3 CH2 CHO give this reaction because it contains α-hydrogen atom. Aldol condensation proceed in presence of strong base. Aldol condensation are 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.

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

$C H_{2} = C H - C H O$

$C H \equiv C - C H O$

$C_{6} H_{5} C H O$

$C H_{3} = C H_{2} C H O$

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

CH2​=CH−CHO

CH≡C−CHO

C6​H5​CHO

CH3​=CH2​CHO

$C H_{2} = C H - C H O$

$C H \equiv C - C H O$

$C_{6} H_{5} C H O$

$C H_{3} = C H_{2} C H O$