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

Question

Quizplus · Accepted Answer

The presence of peaks in the infrared spectrum at 1630-1820 cm^-1 (strong, broad) is indicative of the C=O stretch found in aldehydes and ketones. The absence of peaks at 3200-3650 cm^-1 rules out alcohols, which would show O-H stretching in this region, and the absence of peaks at 1000-1250 cm^-1 rules out ethers and esters, which would show C-O stretching in this region.

Which of the Following Functional Groups Is Likely to Be