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

Question

Quizplus · Accepted Answer

From the spectrum, we can observe several peaks:
- 3 singlets (S1)
- 2 doublets (S2)
- 2 triplets (S3)
- a multiplet centered around δ 1 (S4)
- a broad signal around δ 4 (S5)

Based on this information, we can determine the structure of the compound as follows:

- The broad peak at δ 4 suggests the presence of a CH2 group, likely attached to an electronegative atom (such as oxygen or nitrogen).
- The multiplet (S4) suggests the presence of a CH3 or CH2 group attached to a functional group containing electronegative atoms, such as a carbonyl group or an alcohol.
- The three singlets (S1) are most likely methyl groups (–CH3).
- The two doublets (S2) are most likely methylene groups (–CH2–).
- The two triplets (S3) are likely methine groups (–CH–) or possibly a methyl group attached to an electronegative atom.

Comparing these characteristics with the given structures, we can see that compound I fits all the requirements. Therefore, the answer is A) I.

Which of the Following Compounds Is Consistent with the Following