Uranium (III) scorpionates: synthesis and structure of [(TpMe2)2U[N(C6H5)2]] and [(TpMe2)2U[N(SiMe3)2] |
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Authors: | Antunes Maria Augusta Ferrence Gregory M Domingos Angela McDonald Robert Burns Carol J Takats Josef Marques Noémia |
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Institution: | Departamento de Química, Instituto Tecnológico e Nuclear, Estrada Nacional 10, P-2686-953 Sacavém Codex, Portugal. |
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Abstract: | Reaction of (Tp(Me)2)(2)UI] with KNR(2) (R = C(6)H(5), SiMe(3)) in tetrahydrofuran (THF) afforded the monomeric trivalent actinide amide complexes (Tp(Me)2)(2)UN(C(6)H(5))(2)]], 1, and (Tp(Me)2)(2)UN(SiMe(3))(2)]], 2. The complexes have been fully characterized by spectroscopic methods and their structures were confirmed by X-ray crystallographic studies. In the solid state 1 and 2 exhibit distorted pentagonal bipyramidal geometries. The U-NR(2) bond lengths in both complexes are the same but in complex 2 the greater steric demands of the N(SiMe(3))(2) ligand led to elongated U-N(pz) bonds, especially those opposite the amido ligand. |
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