Uranium (III) scorpionates: synthesis and structure of [(TpMe2)2U[N(C6H5)2]] and [(TpMe2)2U[N(SiMe3)2]]

Maria Augusta Antunes; Gregory M Ferrence; Angela Domingos; Robert McDonald; Carol J Burns; Josef Takats; Noémia Marques

doi:10.1021/ic049204x

Uranium (III) scorpionates: synthesis and structure of [(TpMe2)2U[N(C6H5)2]] and [(TpMe2)2U[N(SiMe3)2]]

Inorg Chem. 2004 Oct 18;43(21):6640-3. doi: 10.1021/ic049204x.

Authors

Maria Augusta Antunes¹, Gregory M Ferrence, Angela Domingos, Robert McDonald, Carol J Burns, Josef Takats, Noémia Marques

Affiliation

¹ Departamento de Química, Instituto Tecnológico e Nuclear, Estrada Nacional 10, P-2686-953 Sacavém Codex, Portugal.

PMID: 15476362
DOI: 10.1021/ic049204x

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)U[N(C(6)H(5))(2)]], 1, and [(Tp(Me)2)(2)U[N(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.