Which of the following peaks are NOT expected to be present in the IR spectrum o

Question

Which of the following peaks are NOT expected to be present in the IR spectrum of the synthesized aspirin product?

A.

C=O, sharp, at approximately 1750 cm-1

sp3 C-H, sharp, between 2800-3000 cm-1

OH, broad, between 3200-3500 cm-1

sp2 C-H, sharp, between 3000-3100 cm-1

C=C, weak, at approximately 1550 cm-1 and 1650 cm -1

OH, broad, between 2500-3000 cm-1

C=O, sharp, at approximately 1750 cm-1

sp3 C-H, sharp, between 2800-3000 cm-1

OH, broad, between 3200-3500 cm-1

sp2 C-H, sharp, between 3000-3100 cm-1

C=C, weak, at approximately 1550 cm-1 and 1650 cm -1

OH, broad, between 2500-3000 cm-1

Explanation / Answer

F. OH, broad, between 2500-3000 cm-1

because OH, broad, between 3200-3500 cm-1 is the ir peak for OH group

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