310NSu10Exam1Key - DO ALL QUESTIONS!!! BEST OF LUCK!!! Last...

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Unformatted text preview: DO ALL QUESTIONS!!! BEST OF LUCK!!! Last Name: First Name: PLEASE DO NOT OPEN THIS EXAM BOOKLET UNTIL YOU ARE TOLD TO DO SO!!! Exam results and the answer key will be available in Blackboard on Sunday, July 25 after 12:00 p.m. Enjoy the excursion to Bilbao, and then worry about how you did on the exam! Your exam raw score (out of 300) is calculated below. Your curved exam grade (T-score) on a 100 point scale is listed below the raw score. This exam is worth 27.5% of your final course grade. Page Page Page 2 (25) 8 (10) 14 (32) 3 (10) 9 (15) 15 (24) 4 (10) 10 (20) 16 (39) 5 (20) 11 (20) 6 (30) 12 (10) 7 (25) 13 (10) Total (300) Including this cover page, this exam contains 16 pages. The pK a data, spectroscopic data, periodic table, and scratch paper will be provided separately. CH 310N - Espaa Summer 2010 Dr. Brian M. Bocknack Midterm Exam #1 Friday, July 23, 2010 9:0011:00 a.m. T-Score (100) Midterm Exam #1/Bocknack CH 310N - Espaa 2 MIDTERM EXAM #1 ANSWER KEY In Questions 1 through 5, choose the best answer from the choices provided. Write the letter that corresponds to your choice in the empty box. There should only be one letter in each box. In other words, each of these questions has one choice which is best. 1. (5 points) Consider the molecule shown below. Which set of protons will give rise to the signal which appears farthest downfield in the 1 H NMR spectrum? 2. (5 points) Which of the following processes takes place when an organic molecule absorbs infrared radiation? A. excitation of a molecular rotation B. nuclear spin flip C. excitation of a bond vibration D. ionization (loss of an electron) 3. (5 points) In class, we discussed how a DEPT45 spectrum gives a signal for each nonequivalent protonated carbon atom. How many signals would be observed in the DEPT45 spectrum of the molecule shown below? A. 3 B. 4 C. 6 D. 8 4. (5 points) Consider the four structures drawn below. In which structure is the stretching vibration of the circled bond most likely to be infrared inactive ? H A B C D 5. (5 points) What is the IUPAC name of the ketone shown below? A. 3-Methyl-4-hexanone B. 4-Methyl-3-hexanone C. 4-Ethyl-3-pentanone D. 2-Ethyl-3-oxopentane C O CH 2 O CH 2 CH 3 CH 3 A B C D CH 3 CH 3 O Exam continues on Page 3 B C A D B Midterm Exam #1/Bocknack CH 310N - Espaa 3 MIDTERM EXAM #1 ANSWER KEY In Questions 6 and 7, two infrared spectra are given. Each spectrum was produced by one of the two compounds shown. Match each spectrum to the compound that produced it by writing the appropriate letter in the box. You will earn 6 points for correctly matching the structures to the spectra. To earn the remaining 4 points, provide a brief explanation of the reasoning you used to make your choice. Confine you explanation to the space allotted!!!...
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This note was uploaded on 10/25/2010 for the course CH 310n taught by Professor Iverson during the Summer '08 term at University of Texas at Austin.

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310NSu10Exam1Key - DO ALL QUESTIONS!!! BEST OF LUCK!!! Last...

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