Actinide structural studies. Part 7. The crystal and molecular structures of (2,2′-bipyridyl)dinitratodioxo-uranium(VI) and -neptunium(VI), and diacetato-(2,2′-bipyridyl)dioxo-uranium(VI) and -neptunium(VI)

Abstract

Actinide Structural Studies. Part 7.' The Crystal and Molecular Structures of (2,2'-Bipyridyl)dinitratodioxo-~raniurn(~1) and -neptunium(vi), and Diacetato-(2,2'-bi pyridyl )d ioxo-u ran i u m( VI) and -neptunium (vi) t

Tetrameric entity resulting from two distinct dinuclear uranyl-centered motifs bridged through μ2-OH and pyridazine-3,6-dicarboxylate

“…These geometrical constraints led to a U1-O1H-U2 angle of 127.6(3)°, with a relatively short U … U distance of 4.163(3) Å. Such deviations have been previously described with other rigid N-donor polydendate ligands [14,27,[33][34][35]. The second inorganic unit (UO 2 ) 2 N 2 O 8 (Fig.…”

Actinyl chemistry across the U, Np and Pu series

“…Many uranium phosphine oxide complexes have been structurally and spectroscopically characterised [14][15][16][17][18]. The triphenyl phosphine oxide ligand (TPPO) has been the subject of numerous investigations with both the uranyl and neptunyl moieties [16,[19][20][21][22]. At the CRR, we have also used TPPO as a co-ligand for uranyl(VI) and neptunyl(V) in the preparation of several novel complexes [23][24][25].…”

“…In addition, reaction of NpO 2 Cl 2 ·xH 2 O with R 3 PO (R = Cy, Ph) yielded the air stable [NpO 2 Cl 2 (Ph 3 PO) 2 ] [20], and [NpO 2 Cl 2 (Cy 3 PO) 2 ] as pure crystalline solids in cis and trans configuration. Access to the laboratories facilities at CEA, Atalante, Marcoule (France) allowed us to extend these investigations to plutonyl(VI) chemistry.…”

Radical anionic versus neutral 2,2′-bipyridyl coordination in uranium complexes supported by amide and ketimide ligands

“…23 Other reported complexes of uranium and bipy are consistent with coordination of a neutral bipy ligand. [24][25][26][27][28] In 2000, we reported the structure and reactivity of inverted sandwich complexes formed between a bridging aromatic hydrocarbon and two uranium centers via µ-η 6 ,η 6 interactions and have the formula (µ-η 6 ,η 6 …”