results in a splitting of the resonance into an eight-line multiplet, each line of which has a different broadening dependent on the unequal lifetimes of the 139 La Zeeman states and the its effect on the lineshape can be observed. There are also small, relatively narrow resonances detected at δ{ 31 P} = -251 and -235 ppm, which correspond to P(SiMe3)3 (δ{ 31 P} = -251.2 ppm) and HP(SiMe3)2 and/or H2PSiMe3 57 degradation product(s), respectively. There is only a small difference in the isotropic chemical shift between the solid (δiso-ss{ 31 P} = -123 ppm) and the solution NMR spectra (δiso-sol{ 31 P} = -113 ppm), indicating that the solution and solid structures of 1-La are similar. The span, Ω, describes the breadth of the observed powder pattern to provide a measure of the "magnitude" of the CSA (and associated tensor), whilst the skew, 𝜅, describes the asymmetry of the CSA (and tensor); an axially symmetric tensor has 𝜅 = ±1. For 1-La, the 31 P chemical shift tensor is not axially symmetric (𝜅 ≠ ±1). The span of almost 300 ppm, as well as the downfield isotropic 31 P chemical shift compared to HP(SiMe3)2, 57 highlights a large deshielding of the 31 P nucleus due to bonding to La.