Quiz4key_000

Quiz4key_000 - 4. (3pts) What splitting would you observe...

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Quiz 4 S343 Summer 2010 Name___________________________________________________________ 1. (4pts) Circle all the compounds below (if any) that are consist with the following 13 C NMR data: peaks at 127, 125, 119, 117, 60, 35, and 12 ppm. 2. (2pts) What is the physical reason that some signals are further downfield than others in NMR? Answer has to include reference to the concept of shielding/deshielding affecting the amount of energy between spin states. 3. (4pts) Label the sets of equivalent protons on this compound with letters starting with A through as many are as needed. H 3 C C H 2 C H 2 CH 3 CH 3 H 3 C H H H H A B C B A D E E F F Special zero point bonus: Use the molecule above to draw the face of a cat.
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Unformatted text preview: 4. (3pts) What splitting would you observe for each of these 1 H signals? Write singlet, doublet, triplet, etc., on the lines provided. H 3 C C H 2 C H C H 2 C C CH CH 3 CH 3 O OH H Cl quintet septet doublet 5. (7pts) Use the data given below to determine the structure of the compound. You will receive one point for writing out the table, 3 pts for correct pieces, and 3 points for the right final structure. An ketone with molecular formula C 11 H 14 O 3.81 2.49 1.06 1.53 7.29 7.40 7.27 7.40 7.29 O Estimation quality is indicated by color: good , medium , rough 1 2 3 4 5 6 7 8 PPM 5 1 2 3 3...
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Quiz4key_000 - 4. (3pts) What splitting would you observe...

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