Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

Question

Aicharya · Accepted Answer

More the magnitude of positive charge on the carbonyl carbon, higher will be its reactivity toward nucleophilic attack.

Chlorine being more electron-withdrawing than $\mathrm{O}$ develops more positive charge on carbonyl carbon. The order of reactivity of the various carboxyl derivatives toward nucleophile is
$\mathrm{RCOCl}>\mathrm{RCHO}>(\mathrm{RCO})_{2} \mathrm{O}>\mathrm{RCOOR}$
Most reactive $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$ Least Reactive *

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

Solution