# How to convert benzene to 1-bromo-3-iodobenzene?

Today, my chemistry teacher gave the following organic conversion as homework: benzene to 1-bromo-3-iodobenzene.

I tried something like:

I am not sure about it, can someone review my conversion (as I have got an exam tomorrow)?

1. The final substitution of the diazonium salt is best done with $\ce{CuI}$ rather than $\ce{KI}$ as the copper(I) ions catalyse the reaction. Also heating is not required; the reaction can be run at room temperature (or possible slightly above but not much).