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Published byFrank Hawkins Modified over 8 years ago
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1 H NMR Spectroscopy Advanced Topics
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Fourier Transformation
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Ferromagnetic Impurity (above)
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300 vs. 600 MHz
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Induced Fields
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Benzene Deshielding
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Carbonyl Deshielding
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Alkyne Shielding
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cis or trans? Look at J value for vinyl doublets
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- and -Glucopyranose
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First-Order Doublets /J > 8
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Non First-Order Doublets /J = 2
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coupling J in Hz
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Butanal
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Styrene
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Allyl Alcohol
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Cumene
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Methine H in Isopropyl Group a quartet of quartets
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qq results in 7 lines
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Triplet of triplets (J = 10; J = 5) Intensity Ratios are Different
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dqd (J = 12; J = 7; J = 4)
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Quartet at 25.0, 300 MHz each ppm is 75 Hz
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22.0 (q, J=150), 25.0 (q, J=150) (at 300 MHz)
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At 600 MHz…
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