Which compound would be expected to show intense IR absorption at 1746 cm^-1?

Question

Quizplus · Accepted Answer

The intense IR absorption at 1746 cm-1 is characteristic of the C=O stretch in an aldehyde or ketone functional group. Option B has a ketone functional group, indicated by the carbonyl group (C=O), so it is expected to show intense IR absorption at this frequency. The other options do not have a carbonyl group or have one at a different position, so they are not expected to show absorption at 1746 cm-1.

Which Compound Would Be Expected to Show Intense IR Absorption