EXAMPLE 4 Preparation of Decabromodiphenylethane in a Solvent Using 10% Excess Bromine and 10 wt% Catalyst [0027] This run was made in a similar manner as that of Example 3 by keeping everything else the same except reducing the catalyst back to 10 wt% (0.56 mole %, based on the total moles of bromine) from 20 wt% used in Example 3.