Synthesis and Crystal Structure of UO₂Cl₂(THF)₃:  A Simple Preparation of an Anhydrous Uranyl Reagent

Abstract

Reaction of UO2Cl2·x(H2O) (x = 1, 3) with 6 equiv of ClSiMe3 in THF provides yellow UO2Cl2(THF)3. The single-crystal X-ray structure of the complex reveals a monomer in which the U is coordinated in a pseudopentagonal bipyramidal fashion by two apical oxo groups, three equatorial THF ligands, and two Cl groups. Upon drying the compound, dimeric [UO2Cl2(THF)2]2 is isolated. This compound is a suitable anhydrous starting material for a variety of uranyl coordination compounds.

Perturbation of the O–U–O Angle in Uranyl by Coordination to a 12-Membered Macrocycle

“…1.76(1) and 1.77(1) Å). 47 The other metrical parameters in 3 and 4, including the N pyr -U-N pyr angles, are comparable to those observed in 1 and 2.…”

Binuclear Uranium(VI) Complexes with a “Pacman” Expanded Porphyrin: Computational Evidence for Highly Unusual Bis‐Actinyl Structures

“…Keywords: cation-cation interactions · density functional calculations · macrocycles · pacman-like complexes · uranium use of multiple ligands, [21,[27][28][29][30][31][32][33][34][35] expanded porpyrins and related macrocycles [36,37] are prospective ligands for actinyl complexation, many of which form stable actinyl complexes. [37][38][39][40][41] The Love [42][43][44][45][46][47][48] and Sessler [49,50] groups synthesized a flexible macrocylic ligand H 4 L (Scheme 1), in which the cavity is large enough to hold two transition metals.…”

Charge Transfer in Uranyl(VI) Halides [UO2X4]2− (X = F, Cl, Br, and I). A Quantum Chemical Study of the Absorption Spectra

“…3 In particular, uranyl fluoride draws substantial attention in uranium chemistry since it is a product of the reaction of UF 6 with moisture. 4 In the past, optical properties of the uranyl chloride complexes in the solid state have been extensively studied [5][6][7] and thermodynamic data of U(VI) aquo chloro complexes have been reported.…”