A student runs the same Diels-Alder reaction between butadiene sulfone and maleic anhydride followed by hydrolysis. The student obtains a white solid of similar appearance to our product. However, the melting point of this solid is measured to be 102-103.8 oC.
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a
The sample must still be wet.
b
The sample is NOT the diacid.
c
The sample is impure.
d
The sample is pure.
e
The hydrolysis failed and the student isolated the anhydride.
f
Both the Diels-Alder and hydrolysis steps were successful.
g
The sample is impure and must be recrystallized.
h
The Diels-Alder step of the reaction was successful.