[Organic Chem] NMR Spectroscopy

Feb 3rd, 2012
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Lecture Slides: NMR Spectroscopy Paula Yurkanis Bruice University of California, Santa Barbara [72 slides]

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Chapter 15NMRSpectroscopyPaula Yurkanis BruiceUniversity of California,Santa Barbara 2014 Pearson Education, Inc.Nuclear Magnetic Resonance (NMR) SpectroscopyNMR spectroscopy identifies thecarbonhydrogen framework ofan organic compound.Certain nuclei, such as 1H, 13C, 15N, 19F, and 31P, havea nonzero value for their spin quantum number;this property allows them to be studied by NMR. 2014 Pearson Education, Inc.The Spin State of a Nucleus is Affected byan Applied Magnetic Field 2014 Pearson Education, Inc.The Energy Between the Two Spin States Depends onthe Strength of the Applied Magnetic Field (Bo) 2014 Pearson Education, Inc.The Operating Frequency of the SpectrometerDepends on the Strength of the Magnetic Field 2014 Pearson Education, Inc.All the Hydrogens in a CompoundDo Not Experience the Same Magnetic FieldThe electrons surrounding the nucleus decrease theeffective applied magnetic field sensed by the nucleus. 2014 Pearson Education, Inc.Where Protons Show a Signal 2014 Pearson Education, Inc.Chemically Equivalent Protons(protons in the same environment) 2014 Pearson Education, Inc.How Many Signals?Each set of chemically equivalent protons give a signal in the1H NMR spectrum. 2014 Pearson Education, Inc.How Many Signals? 2014 Pearson Education, Inc.How Many Signals? 2014 Pearson Education, Inc.The Reference CompoundTMS is the reference compound(it appears at =

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