Which of the following functional groups typically exhibits a carbonyl stretch at the lowest frequency?

Question

Quizplus · Accepted Answer

Amides exhibit a carbonyl stretch at the lowest frequency compared to esters, ketones, aldehydes, and ethers due to the presence of a nitrogen atom that donates electron density to the carbonyl carbon, thereby reducing the double bond character of the C=O bond and lowering the stretching frequency.

Which of the Following Functional Groups Typically Exhibits a Carbonyl