EAS//Nitration of bromobenzene
Brief summary of procedure.
- Mix sulfuric acid +nitric acid, then cool in water bath. Addstir bar, condenser and reflux for 10 minutes while slowly addingbromobenzene. Don't exceed 55 degrees celcius
- Heat mixture for 15 minutes below 60 degrees celcius.Cooldown, then pour into 40 mL of cold h2o
- vacuum filtration to isolate crude bromonitrobenzene
- recrystallize with 95% ethanol (cool to room temp, then to 0degrees celcius on ice)
- isolate product by vacuum and wash with ice-cold 95%ethanol.
- concentrate mother liquor under reduced pressure solventremoval.
Suppose your lab mate wants to make2,4-dinitrobromobenzene from bromobenzene using a variation of theproceduredescribed in the textbook.
a) What changes should your lab mate make to the procedure tomaximizetheir yield of 2,4-dinitrobromobenzene? (1.5 point)
b) What is the minimum volume of 12.3M HNO3 that isrequired to make themost 2,4-dinitrobromobenzene from 3.8 mL ofbromobenzene?
