Figure 7
(a) 31P MAS NMR spectrum for 2 obtained using a spinning speed of 5 kHz. The sideband pattern is corresponds to a chemical shift anisotropy (csa) with isotropic shift of −158 p.p.m., daniso = −59.3 ppm, and h = 0.00; (b) 13C MAS NMR spectrum for 2 obtained using a spinning speed of 12.5 kHz. Note that in both spectra, spinning sidebands are marked with asterisks (*). |