Tuesday, July 28, 2009
13C NMR with 1H and 31P Decoupling
NMR users are very familiar with the advantages of proton decoupling when observing 13C. The 13C NMR spectra of phosphorus containing compounds can be made simpler by applying 31P decoupling either on its own or in addition to proton decoupling. The figure below shows the 13C NMR spectrum of dimethyl methylphosphonate with all possible combinations of proton and 31P decoupling. The data collection required a triple resonance probe with the appropriate band pass filters.