Halogen exchange reactions involving uranium-(V) and -(VI) halides
作者:David Brown、John A. Berry、John H. Holloway
DOI:10.1039/dt9820001385
日期:——
The room temperature halogen exchangereactions of UF5 with liquid BBr3 or BCl3 provide convenient new routes to α-UBr5 and β-UCl5, respectively. In both cases the yields are quantitative. Since the uranium pentahalides are the only involatile products of the reactions they are easily isolated. Reactions between BBr3 and solid UCl6 or UCl5 also yield α-UBr5 but in the presence of CH2Cl2, a new crystallographic
Complexes featuring a linear [N≡U≡N] core isoelectronic to the uranyl cation
作者:Stefan S. Rudel、H. Lars Deubner、Matthias Müller、Antti J. Karttunen、Florian Kraus
DOI:10.1038/s41557-020-0505-5
日期:2020.10
The aqueous chemistry of uranium is dominated by the linear uranyl cation [UO2]2+, yet the isoelectronic nitrogen-based analogue of this ubiquitous cation, molecular [UN2], has so far only been observed in an argon matrix. Here, we present three different complexes of [UN2] obtained by the reaction of the uranium pentahalides UCl5 or UBr5 with anhydrous liquid ammonia. The [UN2] moieties are linear
作者:Kenneth W. Bagnall、Akshya M. Bhandari、David Brown、Philip E. Lidster、Brian Whittaker
DOI:10.1039/dt9750001249
日期:——
reactions involving tropolone and the appropriate pentaethoxide in anhydrous benzene. Reactions between uraniumpentachloride and an excess of tropolone in non-aqueous solvents have yielded chlorotetra(tropolonato) uranium(V), [U(trop)4Cl]. Some physical and chemical properties of these complexes are reported and the UCl5–tropolone reaction is discussed.