Figure 6
(a) 31P MAS NMR spectrum for 1 obtained using a spinning speed of 5 kHz. The sideband pattern is corresponds to a chemical shift anisotropy (csa) with isotropic shift of −161 ppm, daniso = −67.7 ppm, and h = 0.34; (b) 13C MAS NMR spectrum for 1 obtained using a spinning speed of 12.5 kHz. Note that in both spectra, spinning sidebands are marked with asterisks (*). |