chap9solomons

chap9solomons - Chapter9 NuclearMagnetic ResonanceandMass...

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Created by Ch. 9 - Chapter 9 Chapter 9 Nuclear Magnetic Nuclear Magnetic Resonance and Mass Resonance and Mass Spectrometry Spectrometry
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About The Authors About The Authors These PowerPoint Lecture Slides were created and prepared by Professor  William Tam and his wife Dr. Phillis Chang.   Professor William Tam received his B.Sc. at the University of Hong Kong in  1990 and his Ph.D. at the University of Toronto (Canada) in 1995.  He was an  NSERC postdoctoral fellow at the Imperial College (UK) and at Harvard  University (USA).  He joined the Department of Chemistry at the University of  Guelph (Ontario, Canada) in 1998 and is currently a Full Professor and  Associate Chair in the department.  Professor Tam has received several  awards in research and teaching, and according to  Essential Science  Indicators , he is currently ranked as the Top 1% most cited Chemists  worldwide.  He has published four books and over 80 scientific papers in top  international journals such as  J. Am. Chem. Soc., Angew. Chem., Org. Lett.,  and  J. Org. Chem.   Dr. Phillis Chang received her B.Sc. at New York University (USA) in 1994, her  M.Sc. and Ph.D. in 1997 and 2001 at the University of Guelph (Canada).  She  lives in Guelph with her husband, William, and their son, Matthew. Ch. 9
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Ch. 9 - 1. Introduction Classic methods for organic structure  determination Boiling point Refractive index Solubility tests Functional group tests Derivative preparation Mixture melting point Combustion analysis Degradation
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Ch. 9 - Classic methods for organic structure  determination Require large quantities of  sample and are time consuming
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Ch. 9 - Spectroscopic methods for organic  structure determination a) Mass Spectroscopy (MS) fragmentation pattern b) Infrared Spectroscopy (IR) Characteristic functional groups c) Ultraviolet Spectroscopy (UV)  Characteristic chromophore d) Nuclear Magnetic Resonance  (NMR)
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Ch. 9 - Spectroscopic methods for organic  structure determination Combination of these  spectroscopic techniques provides  a rapid, accurate and powerful tool  for Identification and Structure  Elucidation of organic compounds Rapid Effective in mg and microgram  quantities
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General steps for structure elucidation  1. Elemental analysis Empirical formula e.g. C 2 H 4 O 2. Mass spectroscopy Molecular weight Molecular formula e.g. C 4 H 8 O 2 , C 6 H 12 O 3  … etc. Characteristic fragmentation 
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This note was uploaded on 02/25/2011 for the course CHEM 222 taught by Professor Harding during the Spring '08 term at CUNY Hunter.

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chap9solomons - Chapter9 NuclearMagnetic ResonanceandMass...

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