Extending Stannyl Anion Chemistry to the Actinides: Synthesis and Characterization of a Uranium–Tin Bond
摘要:
We have synthesized a rare example of a uranium(IV) stannyl (kappa(4)-N(CH2CH2NSi(Pr-i)(3))(3)U(SnMe3), 1) via transmetalation with LiSnMe3. This complex has been characterized crystallographically and shown to have a U-Sn bond length of 3.3130(3) A, substantially longer than the only other crystallographically observed U-Sn bond (3.166 A). Computational studies suggest that the U-Sn bond in 1 is highly polarized, with significant charge transfer to the stannylate ligand. We briefly discuss plausible mechanistic scenarios for the formation of 1, which may be relevant to other transmetalation processes involving heavy main group atoms. Furthermore, we demonstrate the reducing ability of [SnMe3](-) in the absence of strongly donating ligands on U(IV).
Uranium Pyrrolylamine Complexes Featuring a Trigonal Binding Pocket and Interligand Noncovalent Interactions
作者:Andrew J. Lewis、Ursula J. Williams、James M. Kikkawa、Patrick J. Carroll、Eric J. Schelter
DOI:10.1021/ic202411f
日期:2012.1.2
The syntheses of tri- and tetravalent uranium complexes of the Ar(3)(F)TPA(3-) ligand [Ar(F) = 3,5-bis(trifluoromethyl)phenyl; TPA = tris(pyrrolyl-alpha-methylamine)] are described. Interligand noncovalent interactions between arene groups within the complexes are detected both in the solid state and in solution.