Question

Which of the following has the most acidic hydrogen?

(a) 3-hexanone

(b) 2,4-hexanedione

(c) 2, 5-hexanedione

(d) 2, 3-hexanedione

Answer 1

Correct option (b) 2,4-hexanedione

Explanation:

When CH₂ group is surrounded by two electron withdrawing (electronegative) carbonyl groups then, it is most reactive and its both hydrogen atoms are acidic in character

Thus, CH₂COCH_2.COCH₂ CH₃ (2, 4-hexanedione) is one of the reactive methylene compounds.