310NSP07Exam1_Key - Bocknack CH 310N Spring 2007 Midterm...

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Bocknack CH 310N – Spring 2007 – Midterm Exam #1 – Answer Key 2 Part I – All answers to questions on this page must be submitted on the bubble sheet, using a #2 pencil. Only answers submitted on the bubble sheet will be graded!!! PLEASE READ EACH QUESTION VERY CAREFULLY !!! In Questions 1 through 3, a spectrum (IR, 1 H NMR, or 13 C NMR) is shown. Near each spectrum, four structures are given. Pick the structure that produced the spectrum, and indicate your choice on the answer sheet. 1. (10 points) What compound produced the IR spectrum given below? 2. (10 points) What compound produced the 1 H NMR spectrum given below? Please note that the multiplicity of each signal (i.e. singlet, doublet, triplet, etc.) is not given. You don’t need to know this information to answer this question! 3. (10 points) What compound produced the 13 C NMR spectrum given below? There are only 4 signals in this spectrum. A. Polar molecule B. Nonpolar molecule O H O H 3 C OH O A. B. C. D. A. B. C. D. 1H 2H 1H 6H CH 3 CH 3 CH 3 CH 3 CH 3 H 3 C CH 2 CH 3 A. B. C. D. (+5 awarded if choice A was picked)
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Bocknack CH 310N – Spring 2007 – Midterm Exam #1 – Answer Key 3 Part I – All answers to questions on this page must be submitted on the bubble sheet, using a #2 pencil. Only answers submitted on the bubble sheet will be graded!!! PLEASE READ EACH QUESTION VERY CAREFULLY !!! In Questions 4 through 8, you need to predict the number of signals that would be expected to appear in the 1 H NMR spectrum of each compound shown, ignoring spin-spin splitting . You should assume that each set of nonequivalent protons produces one signal, but don’t worry about whether each signal is a singlet, a doublet, a triplet, etc. Indicate your choice on the answer sheet 4. (5 points) How many signals would appear in the 1 H NMR spectrum? A. 1 C. 3 E. 5 G. 7 I. 9 B. 2 D. 4 F. 6 H. 8 J. 10 5. (5 points) How many signals would appear in the 1 H NMR spectrum? A. 1 C. 3 E. 5 G. 7 I. 9 B. 2 D. 4 F. 6 H. 8 J. 10 6. (5 points) How many signals would appear in the 1 H NMR spectrum? A. 1 C. 3 E. 5 G. 7 I. 9 B. 2 D. 4 F. 6 H. 8 J. 10 7. (5 points) How many signals would appear in the 1 H NMR spectrum? A. 1 C. 3 E. 5 G. 7 I. 9 B. 2 D. 4 F. 6 H. 8 J. 10 8. (5 points) How many signals would appear in the 1 H NMR spectrum? A. 1 C. 3 E. 5 G. 7 I. 9 B. 2 D. 4 F. 6 H. 8 J. 10 Part I continues on Page 4… H H H H H H H H H H H H H H H H H 3 C H H H H H H H H H H H H H H H O C H 3 H 3 C H 3 C H 3 C C H 3 C H 3 H H H H H H H H O H H (+2 awarded if choice E was picked) (+2 awarded if choice E was picked) (Each type of nonequivalent proton is indicated with a different color in the structures below) (diastereotopic) (diastereotopic)
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Bocknack CH 310N – Spring 2007 – Midterm Exam #1 – Answer Key 4 Part I – All answers to questions on this page must be submitted on the bubble sheet, using a #2 pencil. Only answers submitted on the bubble sheet will be graded!!! PLEASE READ EACH QUESTION VERY CAREFULLY
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This note was uploaded on 03/20/2008 for the course CH 310n taught by Professor Iverson during the Summer '08 term at University of Texas at Austin.

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310NSP07Exam1_Key - Bocknack CH 310N Spring 2007 Midterm...

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