Fig. 2. (a) Low-temperature (T = –40 °C) experimental 31P NMR spectra of [P4H][Al(OTeF5)4] in o-DFB (external lock: [D6]acetone). The atom labelling is indicated in accordance with the AX2Y2 spin system. (b) 31P NMR spectrum (162 MHz, top) and simulated PX and PY signals (bottom) of the species [P4H]+(edge). (c) Experimental and simulated 1H NMR spectrum (401 MHz). The full spectra are provided in Fig. S1 and S2.‡ (d) Simulated 31P NMR PX and PY signals of the species [P4H]+(apex).
