Pad 9:48 pm 69% : QUESTION5 The structure of PFs by the Valence Shell Electron Pair Repulsion (VSEPR) theory is a trigonal bipyramidal structure (shown below). At low temperature, the structure is "locked" into this trigonal bipyramidal structure and the P-Faxial bond lengths are longer than the P- Fequatorial bond lengths giving two different environments for the F atoms. However, at room temperature, the molecule undergoes fluxional behaviour due to Berry pseudorotation (common for trigonal bipyramidal complexes) such that the fluorines are not rigidly fixed in axial or equatorial positions and thus all fluorines appear to be magnetically equivalent on the nmr timescale eq eq ax With this knowledge, sketch the observed splitting patterns expected in 19F and 3"P NMR spectra for each resonance at both low temperature and room temperature 19F, I= ½; 31P, 1 = ½. Both 31P and 19F are 100% abundant i) 19F NMR spectrum low temperature [2 marks] i) 31P NMR spectrum low temperature [2 marks] ii) 19F NMR spectrum room temperature [2 marks] iv) 31p NMR spectrum room temperature