Question

how many signals would be present in the ¹hnmr?

Explanation:

Step1: Identify equivalent hydrogen - types

In \(^1\)H - NMR, equivalent hydrogen atoms give the same signal. Analyze the molecule's symmetry.

Step2: Count non - equivalent hydrogen groups

The left - hand methyl group hydrogens are one type. The two methylene groups in the middle are two different types (due to the different environments relative to the carbonyls). The right - hand methyl group hydrogens are another type. So there are 4 non - equivalent hydrogen groups.

Answer:

4