Uranium (III) Scorpionates: Synthesis and Structure of [(Tp<sup>Me</sup><sub><sup>2</sup></sub>)<sub>2</sub>U{N(C<sub>6</sub>H<sub>5</sub>)<sub>2</sub>}] and [(Tp<sup>Me</sup><sub><sup>2</sup></sub>)<sub>2</sub>U{N(SiMe<sub>3</sub>)<sub>2</sub>}]
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Reaction of [(TpMe2)2UI] with KNR2 (R = C6H5, SiMe3) in tetrahydrofuran (THF) afforded the monomeric trivalent actinide amide complexes [(TpMe2)2U{N(C6H5)2}], 1, and [(TpMe2)2U{N(SiMe3)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−NR2 bond lengths in both complexes are the same but in complex 2 the greater steric demands of the N(SiMe3)2 ligand led to elongated U−N(pz) bonds, especially those opposite the amido ligand.
创建时间：
2004-10-18
