Multi-Electron Reduction from Alkyl/Hydride Ligand Combinations in U4+ Complexes
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- 作者：William J. Evans ; Elizabeth Montalvo ; Stosh A. Kozimor ; Kevin A. Miller
- 刊名：Journal of the American Chemical Society
- 出版年：2008
- 出版时间：September 17, 2008
- 年：2008
- 卷：130
- 期：37
- 页码：12258-12259
- 全文大小：145K
- 年卷期：v.130,no.37(September 17, 2008)
- ISSN：1520-5126
文摘
The U4+ mixed alkyl hydride complex (C5Me5)U[μ-C5Me3(CH2)2](μ-H)2U(C5Me5)2, 1, which contains a cyclopentadienyl ligand with two metalated methylene substituents, can effect four, six, and eight-electron reductions in which the combination of the two H1− ligands and the [C5Me3(CH2)2]3− moiety delivers four electrons and forms (C5Me5)1−. The reaction is formally equivalent to an alkyl hydride reductive elimination, a transformation common with transition metals not previously observed with f element compounds. This type of alkyl hydride reduction reactivity is also observed with a combination of U4+ alkyl and hydride complexes, (C5Me5)2UMe2/[(C5Me5)2UH2]2, which reduces benzene to make [(C5Me5)2U]2(C6H6), a U3+ complex formally containing a (C6H6)2− ligand.