Which of the following compounds will show absorptions at 1640 cm^-1, 2950 cm^-1and 3050 cm^-1 on the IR spectrum?

Question

Quizplus · Accepted Answer

Compounds with a carbonyl group (C=O) typically show an absorption at around 1640 cm-1, which is characteristic of the stretching vibration of the carbonyl group. Compound III has a carbonyl group, so this compound will show an absorption at 1640 cm-1. Compounds with a C-H bond will typically show absorptions in the 2950-3050 cm-1 range, which is characteristic of the stretching vibrations of various types of C-H bonds. Compound III has C-H bonds in this range, so it will show absorptions at 2950 cm-1 and 3050 cm-1. Therefore, the correct answer is C.

Which of the Following Compounds Will Show Absorptions at 1640