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Multiple Choice Questions on Nuclear Magnetic Resonance Spectroscopy

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1. Which of the following nuclei will have a magnetic moment?




2. How many absorptions will the following compound have in its carbon NMR spectrum?


(a) 3

(b) 4

(c) 5

(d) 6



3. The CMR spectrum of an unknown compound shows 6 absorptions and the PMR spectrum shows 5 absorptions. Which of the following compounds is the unknown compound?




4. The CMR spectrum of an unknown compound shows 4 absorptions and the PMR spectrum shows 4 absorptions. Which of the following compounds is the unknown compound?




5. What is the multiplicity expected in the hydrogen NMR spectrum for the hydrogen atoms marked by a "star" in the following compound?


(a) singlet

(b) triplet

(c) quartet

(d) heptet



6. Which of the following compounds best fits the PMR spectrum shown below. The table shows the chemical shift for groups attached to a bromine atom or a cyano group measured to the center of the multiplet.




7. Which of the following alkyl groups would show the multiplet pattern depicted in the diagram?

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