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Predicting n+1 Spectra. Same Material, Two Skills. Predicting proton spectra: given a structure, what will the proton NMR look like? Useful in synthesis of known target A little more straightforward Interpreting proton spectra: given a spectrum, what is the structure of compound
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Same Material, Two Skills • Predicting proton spectra: given a structure, what will the proton NMR look like? • Useful in synthesis of known target • A little more straightforward • Interpreting proton spectra: given a spectrum, what is the structure of compound • Identify an unknown; side products in synthesis • More experience needed
Predicting Spectra • Step 1: Identify number of signals
Predicting Spectra • Step 2: Table of data
Predicting Spectra • Step 3: Draw spectrum
Practice • Make problems for yourself: ChemDraw • Don’t do chiral compounds
6H, d 5H, multiplet 2H, doublet 1H, multiplet