反应详情

In a 500 ml three-necked round-bottom flask equipped with a reflux condenser, thermometer, dropping funnel with pressure-equalizing, magnetic stirring bar and containing 164 g (0.80 mol) of 2-bromo-4-chlorotoluene, 41.3 ml (128 g, 0.80 mmol) of bromine was added dropwise under exposure to a 500 W lamp for 3 hours at 190° C. The resulting mixture was cooled to room temperature. Fractional distillation gave colorless liquid, b.p. 111-115° C./7 mm Hg. Yield 182 g (80%).

1. customIn a 500 ml three-necked round-bottom flask equipped with a reflux condenser
2. additionwas added dropwise under exposure to a 500 W lamp for 3 hours at 190° C
3. distillationFractional distillation
4. customgave colorless liquid, b.p. 111-115° C./7 mm Hg