反应详情

温度

40 °C

1,10-phenanthroline (10.0 g, 55.5 mmol) and potassium bromide (15.0 g, 126 mmol) were in 250 ml two-neck bottle and the outlet of the condenser tube was introduced with a rubber pipe into NaOH aqueous solution. Sulfuric acid (100 mL, 98%) was poured under ice bath condition, and then fuming nitric acid (50.0 mL, 68% w/w) was added after removing ice bath. Then, the temperature was increased to 40° C. for three hours and further increased to 80˜90° C. for one hour. And then, the temperature decreased and the condenser tube was removed, waiting for the dispersion of bromine gas which remained in the bottle. After 1˜2 hours, the solution in the bottle was poured into ice water and NaOH aqueous solution was added slowly until pH of the mixed solution reached 6˜7. At this time, a large number of yellow solid precipitations were produced, filtered with clean water and then collected as products. Finally, the yellow solids of 7.81 g with a yield of 67% were obtained by recrystallizing the said products with methanol.

1. customafter removing ice bath
2. temperaturefurther increased to 80˜90° C. for one hour
3. customthe condenser tube was removed
4. waitwaiting for the dispersion of bromine gas which
5. waitAfter 1˜2 hours
6. additionthe solution in the bottle was poured into ice water and NaOH aqueous solution
7. additionwas added slowly until pH of the mixed solution
8. customAt this time, a large number of yellow solid precipitations
9. customwere produced
10. filtrationfiltered with clean water
11. customcollected as products
12. customFinally, the yellow solids of 7.81 g with a yield of 67% were obtained
13. customby recrystallizing the said products with methanol