138771-84-3Relevant academic research and scientific papers
Reduction of Uranium(IV) and Its Mixtures with an Olefin or an Alkyne in Tetrahydrofuran Solutions by Solvated Electrons
Koulkes-Pujo, A. M.,Marechal, J. F.,Motais, B.,Folcher, G.
, p. 4838 - 4843 (1985)
The reduction of UCl4 and its mixtures with different olefins (stilbene, St, diphenylethylene, DPE, acenaphthylene, Ac) or with diphenylacetylene (DPA) was studied by pulse radiolysis of tetrahydrofuran (THF) solutions.U(III) was formed by U(IV) reaction either with the solvated electrons created by THF radiolysis or with the transitory anions St- and DPA-.In the latter case, the reaction proceeds via a first step leading to - or -.In the case of DPE- the first species, -, does not lead to U(III) but is destroyed by THF(H)+ giving DPE(H). and U(IV).Ac- does not react with U(IV).A mechanistic scheme of this electron attachment is discussed as well as its implication in catalytic hydrogenation of olefins in LiAlH4-UCl4 solutions.It is concluded that the catalytic effect observed is rather the result of a hydride transfer from a uranium transient compound to the alkenes.
