Question 14 of 24 Map Sapling Learning The labels on a shipment of the five chem

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Question 14 of 24 Map Sapling Learning The labels on a shipment of the five chemicals A-Ebelow were washed off by accident when the delivery truck went through a truckwash with the doors open. A clever student took infrared spectra of each of the resulting unknowns. Unknown #1 had a strong, broad IR absorption at 3400-3600 cm 1, and no absorptions between 1600 and 2900 cm Unknown #2 had a strong absorption at 1680 cm and no absorptions above 3100 cm What are the structures of unknowns 1 and 2? OH OH Unknown #1 Unknown #2 O A O C A Previous ® Give Up & View Solution Check Answer Next Ext O Hint

Explanation / Answer

Unknown#1 = B

(since IR absorption at 3400 - 3600cm-1 indicates it is alcohol and no absorptions between 1600cm-1 to 2900cm-1 indicates it does not have carbonyl functionality)

Unknown#2 = C

(since IR absorption at 1680cm-1 indicates it is unsaturated carbonyl compound and no absorptions above 3100cm-1 indicates it does not have alcohol functionality)

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