The infrared spectrum of a compound with molecular formula C₆H₈O has weak peaks around 1650 cm^-1 and a strong peak around 1775 cm^-1.What is the most likely structure of this compound?

Question

Quizplus · Accepted Answer

The weak peaks around 1650 cm^-1 suggest the presence of a carbonyl group (C=O) and the strong peak around 1775 cm^-1 suggests the presence of a double bond (C=C) or a conjugated carbonyl group (C=O) with electron-withdrawing substituents. Only option B has both a carbonyl group and a conjugated double bond, which is most likely responsible for the strong peak around 1775 cm^-1. Thus, option B, which has a cyclic structure with a carbonyl group and a conjugated double bond, is the most likely structure for the compound.

The Infrared Spectrum of a Compound with Molecular Formula C6H8O

The Infrared Spectrum of a Compound with Molecular Formula C₆H₈O