Reaction 1 — Halogenation of Benzene

$\text{C}_6\text{H}_6 + \text{Cl}_2 \xrightarrow{\text{FeCl}_3} \text{C}_6\text{H}_5\text{Cl} + \text{HCl}$

SMILES: c1ccccc1 + $Cl_{2}$ → Clc1ccccc1 (chlorobenzene)

Electrophile generation: $FeCl_{3}$ + $Cl_{2}$ → $Cl^{+}$[$FeCl_{4}$]^{-}