COMEDK2024Evening ShiftChemistryHydrocarbonsActual
Arrange the following compounds in the increasing order of their reactivity when each of them is reacted with chloroethane / anhydrous AlC l₃ .
Options
- AD < A < B < C
- BC < B < A < D
- CD < B < A < C
- DC < D < B < A
Correct answer
C. D < B < A < C
Step-by-step solution
The reaction of chloroethane with anhydrous AlCl₃ is a Friedel-Crafts alkylation reaction. This reaction is an electrophilic aromatic substitution where the benzene ring acts as a nucleophile. The reactivity of the aromatic ring towards electrophilic substitution depends on the electron density of the ring. Electron-donating groups increase the electron density and thus increase the reactivity, while electron-withdrawing groups decrease the electron density and decrease the reactivity. Let us analyze the substituen