This is an in class activity to introduce the topic of multinuclear NMR, which is not covered (beyond 13C) in our sophomore level organic course. It is designed to walk the students through the process of predicting NMR spectra, as they learned in sophomore organic chemistry, but for a different I=1/2 nucleus, in this case 19F, which is I=1/2 and 100% abundant.
The student will be able to predict the molecular structure of an inorganic fluorinated compound. The student will be able to use basic symmetry arguments to identify equivalent nuclei. The student will be able to draw a stick diagram to predict the splitting pattern (including relative intensities) of an NMR peak. The student will be able to predict the integrations for various peaks in an NMR spectrum. The student will be able to use basic shielding arguments to order the peaks in a predicted NMR spectrum according to chemical shift. The student will be able to sketch a predicted 19F NMR spectrum.
I found it helpful to walk through the procedure for predicting 1H NMR spectra using a simple molecule like ethylbenzene, before asking my students to do the same for this fluorine compound.