In the infrared spectrum,a compound of formula C₄H₈O gave an absorption band at 1720 cm^-1,but no bands at 2720 - 2830 and 3400 cm^-1.What is the compound?

Question

Quizplus · Accepted Answer

The absorption band at 1720 cm-1 corresponds to the carbonyl group in a ketone or aldehyde compound. The absence of absorption bands at 2720 - 2830 cm-1 and 3400 cm-1 indicates the absence of C-H stretching in an aldehyde compound or O-H stretching in an alcohol compound. Among the options, 2-butanone (choice A) fits this description, as it has a carbonyl group but no C-H or O-H stretching bands in the specified region of the infrared spectrum. Therefore, choice A is the best answer.

In the Infrared Spectrum,a Compound of Formula C4H8O Gave an Absorption

In the Infrared Spectrum,a Compound of Formula C₄H₈O Gave an Absorption