Lanthanides trifluoromethylsulfonate

The lanthanide trifluoromethylsulfonates M(CF3S03)3 have been prepared and their complexes with pyo and bpyo have been prepared in ethanol or ethanol/triethylformate and examined. Complexes [M(pyo)g](CF3S03)3 and [M(bpyo)4](CF3S03)3 (M = La, Nd, Eu or Ho in each case) were obtained and results indicated that the anions were not coordinated.304,305 A number of complexes of pyo, bpyo and 2,2, 6, 2"-terpyridyl-JV,lV, iV"-trioxide (tpyo) with... 

The vast majority of the macrocyclic complexes of the lanthanide(III), yttrium(III) and uranyl ions obtained so far by metal-templated synthesis are of the Schiff-base type even the few known examples of simple polyamine complexes actually result from the cyclic condensation of a diamine with a (modified) carbonyl precursor. In general, the metal-templated synthesis is facilitated by the presence of oxygen-donor anions, such as nitrate, acetate, or trifluoromethylsulfonate lanthanide(III) thiocyanates have also been successfully used. With a few exceptions, the outcome of the synthesis appears to be independent of the order of addition of the reactants. No deliberate attempts have been made to investigate the detailed mechanism of these metal-templated cyclic condensation reactions. 

---