Learning Goal: I’m working on a chemistry exercise and need a sample draft to help me learn.
Instructions:
Compounds Amounts
anthracene 0.520 g
maleic anhydride 0.320 g
crude Diels Alder product 0.623 g
recrystallized Diels Alder product 0.550 g
Experimental melting point of recrystallized product 266 – 268 Celsius
Xylenes (solvent) 35 mL
Post-Laboratory Questions
1. Calculate the percent yield for your product, before and after recrystallization.
2. Calculate the percent recovery from the recrystallization.
3. The product of this reaction can be hydrolyzed by water. Show the product of hydrolysis.
4. Recrystallizing an anhydride (such as the product of this reaction) from water or from an alcohol is rarely a good idea. Explain why.
5. (a) Compare the carbonyl region of your IR spectrum with that of maleic anhydride. What are the similarities? What are the differences? (b) Does your IR spectrum allow you to confirm that the structure of the product is a combination of the two reactants? Briefly explain.
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