HW01Key - : (b) Explanation : 4000 3000 2000 1500 1000 500...

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Graded Homework Problem #01 – Answer Key Deadline : 3:00 p.m., Monday, 1/28/08 LATE WORK WILL NOT BE ACCEPTED OR GRADED!!! This problem is worth a total of 20 raw points. In each part below, an infrared spectrum is shown. To the right of each spectrum, four structures are given. Circle the structure of the compound that produced the IR spectrum. You will earn 6 points for circling the correct structure. To earn the remaining 4 points for each part, explain briefly how you arrived at your answer (the amount of space provided should be enough for a suitable explanation). (a) Explanation
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Unformatted text preview: : (b) Explanation : 4000 3000 2000 1500 1000 500 4000 3000 2000 1500 1000 500 OH O O CH 3 O CH 3 CH 3 The strong absorption band near 1710 cm 1 suggests the presence of a carbonyl group (C=O stretch). The circled choice is the only molecule which contains a carbonyl group. The medium absorption band near 1640 cm 1 is consistent with the presence of an alkene double bond (C=C stretch). The band near 3100 cm 1 suggests that the molecule also has vinylic hydrogens (=CH) stretch. The circled molecule is the only one that contains both of these structural features....
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This note was uploaded on 04/30/2008 for the course PHY 317L taught by Professor Ritchie/lang during the Fall '08 term at University of Texas at Austin.

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