A General and Modular Synthesis of Monoimidouranium(IV) Dihalides
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- 作者：Robert. E. Jilek ; Liam P. Spencer ; David L. Kuiper ; Brian L. Scott ; Ursula J. Williams ; James M. Kikkawa ; Eric J. Schelter ; James M. Boncella
- 刊名：Inorganic Chemistry
- 出版年：2011
- 出版时间：May 16, 2011
- 年：2011
- 卷：50
- 期：10
- 页码：4235-4237
- 全文大小：738K
- 年卷期：v.50,no.10(May 16, 2011)
- ISSN：1520-510X
文摘
The conproportionation reaction between the dimeric diimidouranium(V) species [U(NtBu)2(I)(tBu2bpy)]2 (tBu2bpy = 4,4鈥?di-tert-butyl-2,2鈥?bipyridyl) and UI3(THF)4 in the presence of additional tBu2bpy yields U(NtBu)(I)2(tBu2bpy)(THF)2 (2), an unprecedented example of a monoimidouranium(IV) dihalide complex. The general synthesis of this family of uranium(IV) derivatives can be achieved more readily by adding 2 equiv of MN(H)R (M = Li, K; R = tBu, 2,6-iPrC6H3, 2-tBuC6H4) to UX4 in the presence of coordinating Lewis bases to give complexes with the general formula U(NR)(X)2(L)n (X = Cl, I; L = tBu2bpy, n = 1; L = THF, n = 2). The complexes were characterized by 1H NMR spectroscopy and single-crystal X-ray diffraction analysis of compounds 2 and {U[N(2,6-iPrC6H3)](Cl)2(THF)2}2 (4). (The X-ray structures of 5 and 6 are reported in the Supporting Information.)