a. Write the equation for the reaction of chlorine with benzene in the presence of an iron(III) chloride catalyst.

b. What do we call this type of mechanism for the reaction in part a?

c. Draw the mechanism of the reaction in part a, with Cl⁺ as the attacking species and using curly  arrows to show the movement of electron pairs.

d. Draw the displayed formula of the ‘tri-substituted’ halogenoarene produced if methylbenzene is added to excess bromine at room temperature in the presence of iron(III) bromide.

e. How would the reaction in part d differ if the methylbenzene and bromine were boiled in the presence of UV light?

f. Name the mechanism of the reaction in part e.