Amount of reactants used -use to calculate how much of 9-bronoantharacene shall

Question

Amount of reactants used -use to calculate how much of 9-bronoantharacene shall be produced. Calculate th percent yield for the reaction.

Reagents and Equipment. Weigh and add 50.0 mg (0.28 mmol) of an- thracene and 50 mg (0.28 mmol) of N-bromosuccinimide to a 3.0-mL conical vial containing a magnetic spin vane. To this mixture add 0.4 mL of carbon tetrachloride followed by one drop of Iz-CCl, solution delivered from a Pasteur pipet. CAUTION: Carbon tetrachloride is a cancer suspect agent. Dispense it in the hood using an automatic delivery pipet. Attach the vial to a reflux condenser fitted with a calcium chloride drying tube INSTRUCTOR PREPARATION I CCL4 SOLUTION. Iodine (0.2 g 0.01 mol) is dissolved in 10 mL of carbon tetrachloride. Place the solution in a hood for shident us0

Explanation / Answer

Here, the no. of mmol of anthracene = 0.28 mmol

The no. of mmol of NBS = 0.28 mmol

Therefore, the theoretical no. of mmol of 9-bromoanthracene that can be formed = 0.28 mmol

The molar mass of 9-bromoanthracene = 257 g/mol

Now, the theoretical mass of 9-bromoanthracene = 0.28 mmol * 257 g/mol = 71.96 mg

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