Final answer:
Minimizing the dinitration of bromobenzene can be achieved by controlling the reaction temperature and using a less reactive nitrating agent or lower concentration of nitrating agent.
Step-by-step explanation:
Minimizing the dinitration of bromobenzene can be achieved by using reaction conditions that favor mononitration. One way to achieve this is by controlling the reaction temperature. Lowering the temperature can help reduce the likelihood of a second nitro group being introduced onto the benzene ring. Additionally, using a less reactive nitrating agent or a lower concentration of nitrating agent can also help minimize dinitration. For example, using a milder nitrating agent like nitric acid in acetic anhydride instead of concentrated nitric acid can help prevent dinitration.