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Overview of typical 1H NMR shifts. Note: alkene region modified from earlier handout.
6.6 ¹H NMR Spectra and Interpretation (Part I) Understanding the basics of NMR theory gets us ready to move on to the most important and practical part of this section, which is how to understand the 1H NMR spectrum and elucidate the structure of a compound from 1H NMR spectrum information.
1H-NMR Chemical Shift Table 10.5 9.0 8.0 6.5 13.0 10.0 7.8 6.5 8.0 5.0 8.8 7.6 14 13.5 13 12.5 12 11.5 11 10.5 10 9.5 9 8.5 8 7.5 7 6.5 6 ppm H H O OH O H HO N H O N H. Title: Chemical Shift Table.xls Author: Matt Bowman Created Date:
A GUIDE TO 1H NMR CHEMICAL SHIFT VALUES. Nuclear Magnetic Resonance (NMR) is a commonly used technique for organic compound structure determination. In 1H NMR, applying an external magnetic field causes the nuclei spin to flip.
While modern techniques of nuclear magnetic resonance spectros- copy and mass spectrometry have changed the ways of data acquisition and greatly extended the capabilities of these methods, the basic parameters, such as chemical shifts, coupling constants, and fragmentation pathways remain the same.
'able 14.4 Calculation ofÄH NMR Chemical Shifts for Alkenes See Figure 14.12 for more information. as 0.97 0.93 -1.06 -0.65 —0.40 0.37 0.19
C≡C-H Alkynyl 2 – 3 65 – 95 CH-I Alkyl Iodide 2 – 4 -20 – 10 (can be less than zero ppm!) Benzylic 2.2 – 3 10 – 40 CH-N Amine 2.4 – 3.4 20 – 65 CH-Br Alkyl Bromide 2.5 – 4 20 – 40 CH-Cl Alkyl Chloride 3 – 4 25 – 50 CH-O Alcohol or Ether 3.3 – 4 50 – 90 CH-F Alkyl Fluoride 4 – 4.5 70 – 80 R-OH Hydroxyl 0.5 – 5 ...
