How would the following pair of compounds differ in their IR spectra? Compound o

Question

How would the following pair of compounds differ in their IR spectra? Compound on the left would have the following distinguishing absorptions: strong, broad peak at 3600-3200 cm^-1 medium peak at 3500-3200 cm^-1 medium peak at 3300 cm^-1 medium peak at 3150-3000 cm^-1 strong peak at 3000-2850 cm^-1 medium peak at 2250 cm^-1 strong peak at ~1700 cm^-1 medium peak at at 1650 cm^-1 medium peak at 1600, 1500 cm^-1 Compound on the right would have the following distinguishing absorptions: strong, broad peak at 3600-3200 cm^-1 medium peak at 3500-3200 cm^-1 medium peak at 3300 cm^-1 medium peak at 3150-3000 cm^-1 strong peak at 3000-2850 cm^-1 medium peak at 2250 cm^-1 strong peak at ~1700 cm^-1 medium peak at at 1650 cm^-1 medium peak at 1600, 1500 cm^-1

Explanation / Answer

a and b)

One has a C=O carbonyl group --> has a peak in 1600-1700 area (A)

therefore, choose strong peak at 1700

the double bond between 1600 area (B)

expect a broad peak of OH group in the 3200-3600 (B)

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