Which of the following compounds is consistent with the ¹³C NMR spectrum shown below?

Question

Quizplus · Accepted Answer

The key features to look for in this NMR spectrum are the chemical shifts and coupling patterns. Compound IV shows a singlet at 3.7 ppm, which is consistent with a CH2 group adjacent to an ether oxygen. The two triplets at 2.9 and 1.7 ppm indicate a CH2 group and a CH3 group, respectively, both attached to a carbonyl group (C=O). The quartet at 0.9 ppm is consistent with a CH3 group. This pattern matches the expected signals for Compound IV.

Which of the Following Compounds Is Consistent with the 13C

Which of the Following Compounds Is Consistent with the ¹³C