Unformatted text preview: C343/S2009 Lab Quiz #3 version 2 April 2, 2009 Name AI’s Name 1. Provide the NMR you would expect for the following structures. Label the carbons with letters like a, b, c, etc., and then in the space provided to the right indicate their splitting pattern and integration. Finally circle the carbon that you would expect to be most downfield. Assume all the coupling constants of all nearest neighbors are identical to make the problems simpler. (4 points each) a. b. c. d. TURN OVER! C343/S2009 Lab Quiz #3 version 2 April 2, 2009 1 2. Circle which compound is indicated in the H NMR below and then assign the signals correctly. (3 points) 4H, s 6H, s
1 3. Circle which compound is indicated in the H NMR below and then assign the signals correctly. (3 points) 2H, d 1H, nonet 3H, d (3 points) 4. Draw Pascal’s triangle through to the expected intensities for a sextet. 5. Draw the expected spin-spin splitting for the protons Ha and Hc, with appropriate splitting shown. Provide a name for this type of splitting. (Jtrans = 15 Hz, Jcis = 10 Hz, Jvicinal = 5 Hz) (4 points) TURN OVER! ...
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