Question

How many distinct peaks would appear in the (proton-decoupled) 13C NMR spectrum for the following compound?

1) 6
2) 4
3) 5
4) 7

Answer 1

In the 13C NMR spectrum, there are (C) 5 distinct peaks for the given compound based on the information on aromatic and anomeric proton shifts.

Step-by-step explanation:

In the (proton-decoupled) 13C NMR spectrum for the given compound, we need to determine the number of distinct peaks. Distinct peaks in an NMR spectrum represent different types of carbon atoms in a molecule.

Each unique carbon environment will display a distinct peak on the spectrum. By analyzing the given information on aromatic and anomeric proton shifts, we can identify the number of distinct carbon environments and thus the number of distinct peaks in the 13C NMR spectrum.

In the given information, there are different chemical shifts (d) for the aromatic and anomeric protons. The unique chemical shifts indicate different carbon environments. Counting these unique chemical shifts, we find a total of 5 distinct peaks. Therefore, the correct answer is option 3) 5.