Which of the following functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1000-1250 cm−¹ (strong), but does not have peaks 3200-3650 at 1630-1820 or cm−¹? A) alcohol B) aldehyde or ketone C) ether D) ester

Question

Quizplus · Accepted Answer

Ethers typically show absorption peaks in the range of 1000-1250 cm^-1 due to C-O stretching vibrations, and they do not have the N-H or O-H stretching vibrations that would appear in the 3200-3650 cm^-1 range (characteristic of alcohols) or the C=O stretching vibrations in the 1630-1820 cm^-1 range (characteristic of aldehydes, ketones, and esters).

Which of the Following Functional Groups Is Likely to Be