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Organic Chemistry Chapter 9 Solomons • Fryhle • Snyder
ELEVENTH EDITION Solomons • Fryhle • Snyder Chapter 9 Nuclear Magnetic Resonance and Mass Spectrometry Copyright © 2014 by John Wiley & Sons, Inc. All rights reserved.
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n = number of H atoms on carbons next door
Peaks in a signal = n+1 (3 peaks means 2 H next door, 6 peaks means 5 H next door, etc.)
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Spectrum for compound of the type X-CH2-CH2-CH2-X, where X is electronegative
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Jab = Jbc
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Gives two peaks (axial and equatorial) at low temp
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13C NMR
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Proton-decoupled 13C DEPT NMR
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1H - 1H COSY NMR
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Mass Spectrometry
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Mass Spectrum of CH3F
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Mass Spectrum for CH4 Showing 13CH4 at m/z 17
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Mass Spectrum of C6H5Cl showing 35Cl M+ at m/z 112 and 37Cl M+ at m/z 114
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Notice equal peak heights at m/z 170 and m/z 172 for two isotopes of Br
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Mass Spectrum of 2-Chloropropane
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