Lanthanide complexes of the formula [Ln (fod),]-(fod, 6, 6, 7, 7, 8, 8, 8-heptafiuoro-2, 2- dlmethyl-3, 5-octanedlone) are eff ectlve organlc-soluble nuclear magnetlc resonance shlft reagents for sulfonlum and lsothlouronlum salts. The shlft reagent Is formed in solution from Ln (fod), and Ag (fod) or K (fod). The selectlon of Ag (fod) or K (fod) In forming the shift reagent is dependent on the anion of the organic salt. Ag (fod) Is more effectlve wlth halide ...
