Extraction efficiencies of Pd(ii), Rh(iii), and Ru(iii) from HNO3(aq) to [Hbet][Tf2N] were demonstrated, i.e., Pd(ii) is the most extractable, Rh(iii) is medium extractable, and Ru(iii) is the least extractable. The extraction seems to proceed through coordination of betaine to the metal ions and the cation exchange of the formed complex with H(+).

Reduction of U(VI)O(2)Cl(4)(2-) in a mixture of 1-ethyl-3-methylimidazolium tetrafluoroborate and its chloride at E°' = -0.996 V vs Fc/Fc(+) and 298 K affords U(V)O(2)Cl(4)(3-), which is kinetically stable and exhibits typical character of U(V) in the UV-vis-NIR absorption spectrum.

Extraction behavior of U(VI) species from aqueous HNO 3 solution to [Hbet][Tf 2 N] or [TMPA][Tf 2 N] phase (Hbet: betainium, TMPA: N,N,N-trimethyl-N-propylammonium, Tf 2 N: bis(trifluoromethylsulfonyl)imide) has been studied. It was found that the extractability (E) is 62% in the extraction from 0.01 M HNO 3 to [Hbet][Tf 2 N] and decreases with an increase in [HNO 3 ] and that the U(VI) species are not extracted into [TMPA][Tf 2 N] phase. These results suggest that the extraction of U(VI) species is due to the complex formation of UO 2 2+ with the COO ¹ group of deprotonated betaine (bet). Furthermore, other metal species such as Na(I) and Al(III) in 0.01 M HNO 3 solution were found to be hardly extracted.Recently, functionalized ionic liquids (ILs), so-called taskspecific ILs (TSILs), which incorporate functional groups designed to impart to them particular properties or reactivity, have been synthesized and applied in various fields.19 In the nuclear industry, ILs and TSILs are expected to be used as media for radioactive waste treatment and the reprocessing of spent nuclear fuels, i.e., as alternative media to organic solvents for liquidliquid extraction and to molten salts for pyro-reprocessing processes. Hence, the dissolution properties of uranium oxides (UO 2 and U 3 O 8 ) into ILs, the extraction behavior of uranyl species from aqueous solutions to IL or TSIL phases, electrochemical properties of uranyl species in ILs, and properties of some other actinoid species in ILs have been studied extensively. 1027We have also studied dissolution behavior of uranium oxides (UO 2 and U 3 O 8 ) and electrochemical properties of uranyl species in BMI (1-butyl-3-methylimidazolium)- In order to develop the above processes, it is necessary to confirm as a basic matter whether the U(VI) species can be selectively extracted to the [Hbet][Tf 2 N] phase without adding any extractant. There are many reports related to the extraction of U(VI) species using ILs. However, most of them have proposed methods requiring extractants in the IL phases for the selective extraction of U(VI). 3644In this study, we examined the extraction behavior of U(VI) species from aqueous HNO 3 solutions to [Hbet] Similarly, the extraction behavior of Na(I) and Al(III), which are main components of NaF and Al 2 O 3 adsorbents, was also examined.Dried

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An efficient and practical synthesis of optically active indan-2-ols 1 has been developed starting from readily accessible optically active 4-siloxy-1,6-alkadiynes 2 and ethynyl p-tolyl sulfone, where the metalative Reppe reaction mediated by an economical divalent titanium reagent, Ti(O-i-Pr)(4)/2 i-PrMgCl, is a key step.