New Efficient Synthesis of [UI 4 (MeCN) 4 ]. X-ray Crystal Structures of [UI 2 (MeCN) 7 ][UI 6 ], [UI 4 (py) 3 ], and [U(dmf) 9 ]I 4
2005; American Chemical Society; Volume: 44; Issue: 4 Linguagem: Inglês
10.1021/ic048603p
ISSN1520-510X
AutoresJ.‐C. Berthet, P. Thuéry, M. Ephritikhine,
Tópico(s)Radioactive element chemistry and processing
ResumoReaction of UCl4 and excess Me3Sil in acetonitrile provides a convenient route to [Ul4(MeCN)4] (1), which was isolated in excellent yield and crystallized in acetonitrile as the ion pair complex [Ul2(MeCN)7][Ul6] (2). Compound 1 was transformed in pyridine (py) and dimethylformamide (dmf) into the Lewis base adducts [Ul4(py)3] (3) and [Ul4(dmf)6] (4). Crystals of 3 and [U(dmf)9]l4 (5) were obtained by slow diffusion of diethyl ether into pyridine or dmf solutions of 1; compound 5 is the first tetracationic {U4+} entity to have been crystallographically characterized.
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