Chemistry 29b M. Walker

N.M.R. SPECTROSCOPY: Answers to exercises

Exercise 1. Predict approximate chemical shifts for all the carbon and hydrogen atoms which are explicitly shown in the following molecules:

3. Equivalence

Exercise 2. Predict how many peaks you would expect to see in the 1H and 13C NMR spectra of the following molecules:

4. Integration

Exercise 3: What is the ratio of the hydrogens in the following ¹H spectrum?

The ratio is 2:3:9. The compound is 4,4-dimethyl-2-pentanone.

5. Coupling (¹H only)

Exercise 4. Predict the coupling patterns in the following molecules:

Exercise 5.  Try it out on these NMR spectra:

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