Abstract

In the synergistic extractions of metal ions with the systems 1,1,1-trifluoro-3-2′-thenoyl acetone (HTTA) and neutral organophosphorus compounds, stable complexes have been isolated from the organic phase. These have the following formulae: UO 2(TTA) 2S 1, UO 2(TTA) 2S 3, Th(TTA) 4S 1 and Rare Earth (TTA) 3S 2, where S = a neutral organophosphorus compound. The infra-red spectra of these complexes have been obtained and are discussed in terms of various possible structures.

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