Chemistry - Carbonyl compounds Question with Solution | TestHub

Key Idea Lesser the electron density of acyl carbon atom, more will be the susceptibility of nucleophile to attack it. The $\mathrm{Cl}$ atom has strong $-I$ effect and weakest $+\mathrm{R}$ effect because of the weak $\pi$-bond between the small sized $\mathrm{C}$-atom and large sized $\mathrm{Cl}$ atom. Thus, in ${\mathrm{CH}}_3\mathrm{COCl}$, acyl carbon has least electron density and hence, more susceptible for nucleophilic attack.