sulfate after filtration the liquid was concentrated by distilling the solvent thus resulting in 151 g of a crude product the crude product was purified by distillation under a reduced pressure of 0 5 torr at 199 u00b0 c and thus 136 g 0 25 mol yield of 87 of a transparent liquid was obtained this product was subjected to gas chromatography and the purity of the product was 99 6 in a two liter flask having four openings equipped with a stirrer a thermometer a dropping funnel and a reflux condenser respectively 261 g 0 52 mol of 9 9 didodecylfluorene 1 l of water and five drops of sulfuric acid were placed and stirred to mix by adding 200 g 1 3 mol of bromine into the mixture a reaction was started after the reaction had been conducted at 60 u00b0 c for 12 hours unreacted bromine was decomposed with an aqueous solution of sodium hydrogen sulfite the target product was extracted from the reaction mixture using hexane and then washed with water and a sodium hydrogencarbonate aqueous solution the resulting organic liquid was dried using anhydrous magnesium sulfate after filtration the liquid was concentrated and then allowed to stand at 0 u00b0 c so that a white solid was precipitated the precipitate was filtered and subsequently washed with hexane followed by drying thus 312 g 0 47 mol yield of 93 of a white solid product was obtained this product was subjected to gas chromatography and the purity of the product was 99 0 in a two liter flask having four openings equipped with a stirrer a thermometer a dropping funnel and a reflux condenser respectively 1 l of water three drops of a surfactant 10 7 g 0 0395 mol of anhydrous iron iii chloride and.