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The following exercises are designed to help you become familiar with predicting the 1H NMR spectra of simple organic molecules. For each example you should find the number of signals you expect, where they should show on the scale (chemical shift), and what shape they should be (splitting patterns).
In the following NMR practice problems, we will go over the best strategies you can use for identifying the structure of unknown compounds. As a Chemistry Steps Prime member, you will also get access to the Spectroscopy Summary Sheets in addition to these over 100 min videos of solving NMR problems.
1 H NMR Multiplicity Practice. Instead of predicting the number of lines, we often need to look at the peak and predict how many H are on neighboring carbons. Determine how many H are next door to the observed H looking at the following splitting patterns: 1 H NMR Multiplicity. Here is the spectrum of propane again. Explain the multiplicity of ...
22 Ιουν 2000 · Interpretation of spectra is a technique that requires practice - this site provides 1 H NMR and 13 C NMR, DEPT, COSY and IR spectra of various compounds for students to interpret. Hopefully, these problems will provide a useful resource to better understand spectroscopy.
27 Απρ 2016 · This organic chemistry video provides a review of H NMR spectroscopy. It provides plenty of examples and multiple choice practice problems that you might encounter on your next test or...
Most problems contain an IR spectrum (film or KBr pellet), a 500 MHz 1 H NMR spectrum, a 125 MHz 13 C NMR spectrum, and a 70 eV electron ionization Mass Spectrum. Problems 5, 7, and 17 also include 2D NMR data (COSY, HSQC, NOESY, and HMBC).
Show all your work (= label peaks in the spectra!) Determine the degree of unsaturation for the compound. Assign the six pertinent peaks in the infrared spectrum. Suggest a structure for compound W based on the spectra given.
