What would the balanced equation be for this reaction?

Weigh a clean dry 100ml round bottomed flask (24/40 ground glass joint) with a stopper and add approx. 1g of ground Et4NI (weigh the Et4NI in the RBF). Add approx. 10ml of hexane to the RBF. Bromine gives off very poisonous vapour and causes severe burns. Ask TA before use. Add a 10-20\% excess of the predetermined amount of Br2 using a 1ml disposable syringe slowly while swirling the flask. - If the bromine is added too fast, then large clumps of product will be formed. The volume of bromine to be added should be calculated from the balanced equation, the density of Br2 is 3.12g/ml. Seal the flask and swirl it for 2-3 minutes. Break up any chunks with a glass stirring rod. Replace the stopper with the adaptor supplied and remove the solvent and excess bromine under vacuum, using a vacuum pump, while swirling the precipitate and solution. (Note. Start the suction before attaching the suction hose to the adaptor, and remove the hose before turning off the suction). The last traces of solvent will be removed on a vacuum line. Reweigh the RBF and the product (don't forget the stopper!) after complete removal of the solvent. Determine the melting point (compare with that of Et4NI )