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UTa 2 O ( S 2 ) 3 Cl 6 : A ribbon structure containing a heterobimetallic 5 d – 5 f M 3 cluster
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wells, Daniel M. Chan, George H. Ellis, Donald E. Ibers, James A. |
| Copyright Year | 2010 |
| Abstract | A new solid-state compound containing a heterobimetallic cluster of U and Ta, UTa2O(S2)3Cl6, has been synthesized and its structure has been characterized by single-crystal X-ray diffraction methods. UTa2O(S2)3Cl6 was synthesized from UCl4 and Ta1.2S2 at 883 K. The O is believed to have originated in the Ta1.2S2 reactant. The compound crystallizes in the space group P1̄ of the triclinic system. The structure comprises a UTa2 unit bridged by m2-S2 and m3-O groups. Each Ta atom bonds to two m2-S2, the m3-O, and two terminal Cl atoms. Each U atom bonds to two m2-S2, the m3-O, and four Cl atoms. The Cl atoms bridge in pairs to neighboring U atoms to form a ribbon structure. The bond distances are normal and are consistent with formal oxidation states of +IV/+V/–II/–I/–I for U/Ta/O/S/Cl, respectively. The optical absorbance spectrum displays characteristic transition peaks near the absorption edge. Density functional theory was used to assign these peaks to transitions between S valence-band states and empty U 5f–6d hybrid bands. Density-of-states analysis shows overlap between Ta 5d and U bands, consistent with metal–metal interactions. & 2009 Elsevier Inc. All rights reserved. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://chemgroups.northwestern.edu/ibers/Publications/UTa2O(S2)3Cl6.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
