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Radical Halogenation Photobromination of 1,2-diphenylethane lab

1,2-dibromo-1,2-diphenylethane could also be obtained by using bromine in dichloromethane (solvent) using an electrophilic addition reaction (hint: CHM228, Lab 9). Write the chemical equation of this reaction: Although you did not add water to the reaction flask, there was water at the end of the reaction. What were the TWO sources of the water that you removed with a pipet? Procedure Place 0.600g (record exact amount used with all decimal places) of 1,2-diphenylethane (bibenzyl) and 8.0mL of hexane in a 25mL round bottom flask with a magnetic stir bar. Stir until the solid completely dissolves. Add 0.400g potassium bromate to the solution and continue stirring. Obtain 0.50mL of 48%(9M) hydrobromic acid solution (this will be measured in advance for you) and transfer to the stirred reaction mixture using a Pasteur pipet. Immediately, place a condenser on the flask. Irradiate the reaction mixture with a 100 -watt incandescent light bulb located 56 inches from the reaction flask until the orange color of bromine is gone. (You may use the flashlight form your phone) When the reaction is complete, remove the condenser. Using a pipet, insert the tip of the pipet to the bottom of the flask and draw the lower aqueous phase into the pipet. Transfer it to a small, labeled flask and set aside. Add 4.5mL water to the reaction flask and stir thoroughly. Again, remove the aqueous phase and add it to the flask containing the first aqueous phase. Collect the solid remaining in the reaction flask by vacuum filtration. Rinse the flask with approximately 3mL of cold ethanol and transfer to the funnel to rinse your solid. Disconnect the vacuum and rinse the crystals on the funnel with approximately 3mL of cold diethyl ether. The product is sufficiently pure for characterization without crystallization. Allow the crystals to completely dry before determining the melting point. Cleanup \& Waste Disposal - Place the filter paper into a Solid Waste container. Leftover product can go in the solid waste or into the organic waste next week. - Pour the filtrate from the reaction mixture into the container for Halogenated Waste