Organic Chemistry Semester 1 LABORATORY MANUAL - Moravian ...

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Infrared Spectroscopy Appendix C8 Part V. Techniques and Theory IR Additional Out of Class Applications: 1. Predict approximate values of important IR ν's for the following compounds: O O CH 3 c. a. b. CH 3 NH 2 O N H d. CH 3 CH 2 C N 2. What functional groups are likely to be present in each of the following compounds Explain your logic. (1.) C 4 H 6 O 3025, 2940, 2800, 2720, 1680 (st), 1630 cm -1 (2.) C 7 H 8 O 3300 (br & st), 3040, 2940, 1610, 1570, 1480, 1460, 1160 cm -1 (3.) C 9 H 10 O 3020, 2955, 1690 (st), 1600, 1590, 1460 cm -1 (4.) C 7 H 7 NO 2 3460, 3360, 3000 (br-st), 1670, 1640, 1180 cm -1 3. For the following pair of structures, if you had the IR spectrum of a reaction product that had to be one of the compounds, how could you use the spectrum to distinguish between the two possible structures Explain how. vs. H O O 4. What functional groups might be present in the molecule that produced the following set of data Give one or two possible structures that are consistent with the molecular formula and the spectrum. Explain your logic. C 5 H 8 O 4000 3600 3200 2800 2400 FREQUENCY (CM -1 ) 2000 1800 1600 1400 1200 1000 800 600 400 80 Transmittance (%) 60 40 20 0
Part V. Techniques and Theory Appendix D1 Mass Spectrometry Appendix D. Mass Spectrometry Mass Spectra Theory & Practice (See also: Padías pp. 98 - 105 & CGWW pp. 50-56) In Mass Spectral Analysis, organic molecules are bombarded by high energy electrons. Impact of an electron on a molecule transfers a large amount of energy to the molecule. M + * e - M * + e - One way that the molecule can dissipate the excess energy is to lose an electron and become a Radical Cation the "Molecular Ion". M * M + . + e - The mass spectrometer is designed to separate and count cations according to their charge/mass ratio (m/z). Since most ions have lost only one electron, m/z = mass of the ion. Examples of Mass Spectra of Pure compounds: 43 CH 3 CH CH 3 CH 2 CH 2 CH2 CH 3 71 85 M + 100 Let's try another compound !!!! What Happened Intensity 27 29 31 41 43 55 70 CH 3 CH 3 O H CH CH 2 CH 2 M + 88 m/z Clearly, There are more ions than just that formed by the loss of an electron from the whole molecule!!! What could be happening
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MORAVIAN COLLEGE CHEMISTRY DEPARTME
Page 4 and 5: Table of Contents (continued) 2 PAR
Page 6 and 7: I. Introduction 4 Fall 2010 Assignm
Page 8 and 9: I. Introduction 6 Fall 2010 Assignm
Page 10 and 11: Part I. Introduction 8 Fall 2010 La
Page 12 and 13: Part I. Introduction 10 Fall 2010 D
Page 14 and 15: Part II. Lab Rules and Regulations
Page 16 and 17: Part II. Lab Rules and Regulations
Page 18 and 19: III Laboratory Records & Report For
Page 24 and 25: Part V. Experiments 22 Fall 2010 Pa
Page 26 and 27: Part V. Experiments 24 Fall 2010 Ex
Page 28 and 29: Part V. Experiments 26 Fall 2010 H
Page 30 and 31: Part V. Experiments 28 Fall 2010 E.
Page 32 and 33: Part V. Experiments 30 Fall 2010 E.
Page 40 and 41: Part V. Experiments 38 Fall 2010
Page 42 and 43: Part V. Experiments 40 Fall 2010 1
Page 45 and 46: Part V. Techniques and Theory Appen
Page 53: Part V. Techniques and Theory Appen
Page 57 and 58: c Part V. Techniques and Theory App
Page 61: Part V. Techniques and Theory Appen
Page 64 and 65: Nuclear Magnetic Resonance Appendix
Page 84: Nuclear Magnetic Resonance Appendix
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