Cross-polarlzatlon/maglc angle

NMR Experiments. Cross polarlzatlon/maglc angle C-NMR spectra were obtained with a Bruker WP-200SY spectrometer equipped with an IBM solids control accessory, operating at 50.325 MHz for carbon and externally tuned with t-butylbenzene. Samples were spun (air driven) at the magic angle at 3 KHz. 

---