Which of the following compounds gives an infrared spectrum with peaks in the ranges of 3200-3650 (strong, broad) and 1600-1640 cm^-¹ (medium); but does not have peaks at 1630-1820 (strong)?

Question

Quizplus · Accepted Answer

Compound 3 has a strong, broad peak in the 3200-3650 cm-1 range, indicating the presence of an O-H stretch in a carboxylic acid or alcohol. It also has a medium peak in the 1600-1640 cm-1 range, indicating the presence of a C=C stretch in an alkene or an amide bond. However, it does not have a peak in the 1630-1820 cm-1 range, which is characteristic of a C=O stretch in a carbonyl compound such as an aldehyde, ketone or ester. Therefore, the correct answer is C.

Which of the Following Compounds Gives an Infrared Spectrum with Peaks