Cerium(III) and Uranium(IV) Complexes of the 2-Fluorophenyl Trimethylsilyl Amide Ligand: C-F â Ln/An Interactions that Modulate the Coordination Spheres of f-Block Elements.
Inorg Chem
; 55(11): 5684-92, 2016 Jun 06.
Article
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| MEDLINE
| ID: mdl-27227729
ABSTRACT
2-fluorophenyl trimethylsilyl amide, N(SiMe3)(C6H4F)(-) was shown to engage in stronger C-F â Ce(III) interactions than pentafluorophenyl trimethylsilyl amide, N(SiMe3)(C6F5)(-), through a comparative study of the Ce(III) model complexes Ce[N(SiMe3)(C6H4F)]3 (1-F1) and Ce[N(SiMe3)(C6F5)]3 (1-F5). The presence of multiple C-F â U(IV) interactions led to complexes 2-X (X = Cl, C≡CPh, OMe) with threefold geometries, featuring a trigonal pyramidal UN3Cl core in the solid-state structures. Density functional theory calculations were applied to 2-Cl to investigate the strength of the C-F â U(IV) interactions and the influence of such interactions on resulting geometries.
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