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Unformatted text preview: 3. Describe the splitting expected for the proton NMR signals of the indicated protons given these coupling constants: J AB = 10 Hz, J BC = 4 Hz, J AC = 1 Hz, J CD = 7 Hz. 4. Use a tree diagram to predict the splitting pattern of H A in the compound below. Draw the pattern to scale. Use the appropriate typical coupling constants given in the coupling constants tables. 5. What does IR stand for? What is IR spectroscopy especially good for when determining the structure of an unknown? 6. What is a mass spectral library, and for what is it used? 7. What is the purpose of an ionizer in the MS instrument? Give an example of one type of ionizer. What is the purpose of a mass analyzer in the MS instrument? Give an example of one type of mass analyzer....
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- Summer '11