What is the structure of the compound in the following ¹H-NMR spectrum with the molecular formula C₅H₁₁NO,which shows a characteristic stretch in the IR around 1700 cm^-1,and a characteristic peak at 202 ppm in the ¹³C-NMR? Relative integration is shown.

Question

Quizplus · Accepted Answer

The IR signal around 1700 cm-1 indicates the presence of a carbonyl group, which is likely a ketone or aldehyde. The peak at 202 ppm in the 13C-NMR suggests a carboxylic acid group. The molecular formula indicates there are 15 boron atoms, which is consistent with a boronic acid group. The chemical shift at around 111 ppm in the 11B-NMR spectrum supports this assignment. Therefore, the structure must contain a ketone or aldehyde group and a carboxylic acid group, along with at least one boronic acid group. Choice B contains all of these functional groups.

What Is the Structure of the Compound in the Following