The reaction of [n-Bu-N][BF4] with an excess of TaFs results in the formation of [n- N][TazFu]. The 19F NMR spectrum is shown below. What is the structure of the anion? Hints: The coupling between ''F and 18lTa can be ignored due to the weak spin quadrupole of the latter. 2F means the integral of the peaks correspond to 2 F atoms, etc. hulle . 2F 8F 1F