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The electronic structures of two uranium compounds supported by redox-active Î±-diimine ligands, (^MesDAB^Me)₂U(THF) (1) and Cp₂U(^MesDAB^Me) (2) (^MesDAB^Me = [ArNâ•C(Me)C(Me)â•NAr]; Ar = 2,4,6-trimethylphenyl (Mes)), have been investigated using both density functional theory and multiconfigurational self-consistent field methods. Results from these studies have established that both uranium centers are tetravalent, that the ligands are reduced by two electrons, and that the ground states of these molecules are triplets. Energetically low-lying singlet states are accessible, and some transitions to these states are visible in the electronic absorption spectrum.

Computational Insights into Uranium Complexes Supported by Redox-Active α-Diimine Ligands G. Li Manni, J.R. Walensky, S.J. Kraft, W.P. Forrest, L.M. Pérez, M.B. Hall, L. Gagliardi and S.C. Bart Inorganic Chemistry, 51 (4) (2012), p2058-2064 DOI:10.1021/ic202522w \| unige:18735 \| Abstract \| Article HTML \| Article PDF
The electronic structures of two uranium compounds supported by redox-active Î±-diimine ligands, (^MesDAB^Me)₂U(THF) (1) and Cp₂U(^MesDAB^Me) (2) (^MesDAB^Me = [ArNâ•C(Me)C(Me)â•NAr]; Ar = 2,4,6-trimethylphenyl (Mes)), have been investigated using both density functional theory and multiconfigurational self-consistent field methods. Results from these studies have established that both uranium centers are tetravalent, that the ligands are reduced by two electrons, and that the ground states of these molecules are triplets. Energetically low-lying singlet states are accessible, and some transitions to these states are visible in the electronic absorption spectrum.

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