Fluorine and phosphorus heteronuclear coupling

The most commonly encountered coupling in NMR spectra is due to ¹H, but other nuclei can induce splitting of signals as well. The previous post discussed how coupling to ¹³C at natural abundance produces the small ¹³C satellite peaks. The other heteronuclear couplings that are most likely to be observed are due to ¹⁹F and ³¹P. Examples of these in 1D ¹H and  ¹³C spectra are shown below.