... Inorganic Chemistry. ... figure. The crystal structures of three salts {[(Ph 3 P)Au] 4 N} + X - , with X = F, BF 4 , and PF 6 , have been ... The { 1 H} 31 P NMR spectra give sharp singlet resonances largely independent of temperature (+30 to −50 °C). There is no discernible fine structure ...