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Published byElfrieda Lang Modified over 9 years ago
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Chapter 13 NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY Chapter 13: Nuclear Magnetic Resonance Spectroscopy
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SOME BASICS OF ELECTROMAGNETIC INTERACTIONS Chapter 13: Nuclear Magnetic Resonance Spectroscopy
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H-NUCLEI (PROTONS) IN AN EXTERNAL MAGNETIC FIELD Chapter 13: Nuclear Magnetic Resonance Spectroscopy
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MAGNETIC SHIELDING Chapter 13: Nuclear Magnetic Resonance Spectroscopy
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SIGNALS OF METHANOL UPFIELDDOWNFIELD
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Fig. 13.5
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60 MHz Spectrum 300 MHz Spectrum
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SAME SPECTRUM WITH CHEMICAL SHIFTS IN PPM 3.4 ppm 4.8 ppm
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CompoundElectronegativity CH 3 I CH 3 Br CH 3 Cl CH 3 F 2.7 3.0 3.2 4.0
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0.2 ppm 3.0 ppm 5.3 ppm 7.3 ppm NUMBER OF ELECTRONEGATIVE ATOMS (GROUPS)
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THE EFFECT OF DISTANCE = 0.9 ppm = 3.4 ppm = 1.7 ppm = 1.3 ppm
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CH 2 CH 2 CH 2 CH 2 Br 300 MHz 60 MHz
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