Which of the following compounds is most reactive towards nucleophilic addition reactions ?

Options

A. `CH_3 - overset(O) overset(||)C - H`
B. `CH_3 - overset(O)overset(||)C - CH_3`
C.
D.

Answer

A

Explanation

Methyl benzaldehyde < Benzaldehyde < Propanone < Ethanal-reactivity towards nucleophilic substitution." Aldehydes are more reactive than aliphatic ketones. Aliphatic kefones are more reactive than aromatic ketones. The +I effect is more in ketone than in aldehyde. Thus ketone will be least reactive in nucleophilic addition reactions. The presence of electron withdrawing group increases the reactivity towards the addition while the presence of electron donating group decreases the reactivity of compound towards nucleophilic addition Benzaldehyde does not favour nucleophilic addition reaction due to resonance stabilisation.