Lanthanide heteropolyacid

Griffith has recently reported the synthesis and use of lanthanide heteropolyacid complexes with aqueous hydrogen peroxide for the oxidation of secondary alcohols.202 The complexes were [LnWi0O36]9 and [Ln(PWj 1039)2] 1 (Ln = La, Pr, Sm, Tb). However, the active oxidant was... 

Triflic anhydride in the presence of a base such as DTBMP is the most frequently used promoter with sulfoxides. It has also been used with lanthanide triflates as coactivators [215]. Promoters other than triflic anhydride for the activation of sulfoxides for glycosylation include TfOH [249,250], TMSOTf in the presence of triethylphosphite [251], the heteropolyacid H3PW12O40 [252], the zirconocene reagent Cp2ZrCl2-AgC104 [253] and iodine and iodine monobromide [254,255]. 

In a recent application of HDEHP to actinide/actinide and actinide/lanthanide separations, Novikov and Myasoedov (1987) report the use of a supported liquid membrane impregnated with HDEHP for the separation of Am/Cm, Eu/Tb, and Am/Eu using DTPA, citric acid, and the potassium salt of a heteropolyacid (KioP2Wi706i - KPWO) as aqueous complexants. The optimum separation factors reported are = 5.0, Sj = 10.8, and > 10. ... 

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