For the majority of paramagnetic 1-M, the corresponding 1 H MAS NMR spectra are relatively uninformative (see Supporting Information Figure ). However, resonances from metal-bound THF can be observed for 1-Ce (δiso{ 1 H} = 11.3 and 5.9 ppm), which are clearly deshielded compared to those from 1-La (δiso{ 1 H} = 5.2 and 2.6 ppm, see Supporting Information Figure ), with the CH2 protons either side of the O atom showing the largest shift. This arises from the proximity of these atoms to the paramagnetic Ce, and results in a large deshielding of the δ11 component of the CSA tensor (see Supporting Information Table ); it appears that the corresponding δ22 component becomes more shielded.