Fig. 2. 119Sn NMR data for the hyperpolarization of 5-(tributylstannyl)pyrimidine (2) in methanol-d 4 through SABRE by 2a; (a) signal enhancement as a function of ligand excess, relative to a 5 mM concentration of catalyst, (b) SNR as a function of ligand excess for the 5 mM loading. Data have been acquired with (D) and without (ND) butyl proton decoupling.
