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How many peaks should we see in the Carbon-13 NMR Spectrum of Propan-2-ol?

Question

How many peaks should we see in the Carbon-13 NMR Spectrum of Propan-2-ol?

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Solution

In the Carbon-13 NMR Spectrum of Propan-2-ol, we should see three peaks. Here's why:

  1. Propan-2-ol has the molecular formula CH3CHOHCH3.

  2. In this molecule, there are three types of carbon environments.

  3. The first type is the carbon in the -CH3 group. There are two of these, but they are in the same environment, so they give rise to one peak.

  4. The second type is the carbon in the -CHOH- group. This is a unique environment, so it gives rise to a second peak.

  5. Therefore, in total, we should see three peaks in the Carbon-13 NMR Spectrum of Propan-2-ol.

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