Question

Order of reactivity towards nucleophilic addition reaction

Answer 1

Arrange the following according to reactivity towards nucleophilic addition reaction:



I have already seen this post regarding the reactivity. It helped me to some extent.

ClCl increases the positive charge on the carbonyl carbon increasing its reactivity.

So (B) > (A) > (the remaining 3)

Further, aldehydes are more reactive than ketones. But I should also consider steric factors. In compounds (C), (D), and (E), compound (D) has highest carbocation stability but also has highest steric hinderance.

Compound (C) has lowest steric hinderance but low carbocation stability as well. How can I arrance (C), (D), and (E)?