Targeted Synthesis of Uranium(IV) Thiosilicates

Two new uranium­(IV) thiosilicates, Cs2Na4[U2(SiS4)2(Si2S8)] and Cs2.12Na3.88[U2(SiS4)2(Si2S7)], were obtained by flux crystal growth using SiS2 as a silicon source. The former compound contains a novel Si2S8 6– unit that features a terminal persulfide group. The magnetic susceptibility measurements...

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Bibliographic Details
Published in:Inorganic chemistry 2019-07, Vol.58 (13), p.8275-8278
Main Authors: Klepov, Vladislav V, Smith, Mark D, zur Loye, Hans-Conrad
Format: Article
Language:English
Subjects:
Crystal structure
Fluxes
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
Silicon
Sulfur
Uranium
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Summary:Two new uranium­(IV) thiosilicates, Cs2Na4[U2(SiS4)2(Si2S8)] and Cs2.12Na3.88[U2(SiS4)2(Si2S7)], were obtained by flux crystal growth using SiS2 as a silicon source. The former compound contains a novel Si2S8 6– unit that features a terminal persulfide group. The magnetic susceptibility measurements performed on this compound revealed paramagnetic behavior with a moment of 3.49 μB per uranium atom as obtained from a Curie–Weiss law fit and showed no magnetic transition down to 2 K. The structures are based on closely related isomeric planar and 3D topologies that can be transformed into one another by a rotation of the structural units.
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.9b01307