Looking for classes? Ksquare Career Institute, Bengaluru →
Which one is most reactive towards Nucleophilic addition reaction?
A
$C_6H_5CHO$
B
$C_6H_5COCH_3$
C
$p\text{-}CH_3C_6H_4CHO$
D
$p\text{-}O_2NC_6H_4CHO$
Detailed Solution
Reactivity towards nucleophilic addition depends on steric and electronic effects.
Order: p-nitrobenzaldehyde > benzaldehyde > p-tolualdehyde > acetophenone
The –M effect of $-NO_2$ increases the positive charge on the $sp^2$ carbonyl carbon.
Order: p-nitrobenzaldehyde > benzaldehyde > p-tolualdehyde > acetophenone
The –M effect of $-NO_2$ increases the positive charge on the $sp^2$ carbonyl carbon.