Palladium disulfide
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| Other names
Palladium(II) disulfide
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3D model (JSmol)
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PubChem CID
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| PdS2 | |||
| Appearance | grey solid[1] or black crystalline powder[2] metallic crystals | ||
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Other anions
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Other cations
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Related compounds
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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Palladium disulfide is a chemical compound of palladium and sulfur with the chemical formula PdS2.[1]
Structure
PdS2 contains sulfur-sulfur bonds so it can be thought of as a disulfide that formally consists of S22− and Pd2+ ions, instead of S2- and Pd4+ ions.[3] It adopts a layered crystal structure that contains square planar palladium centres and trigonal pyramidal sulfur centres.[2]
Preparation
Palladium disulfide is formed when palladium(II) sulfide is heated with an excess of sulfur.[1]
- PdS + S → PdS2
However, some starting material may remain even after heating for many months. An alternative route involves heating palladium(II) chloride and excess sulfur to 450 °C in a sealed tube, then washing the crude product with carbon disulfide. This procedure yields PdS2 free of PdS.[2]
Related compounds
A variety of other compounds in the Pd-S system have been reported, including Pd4S, Pd2.8S, Pd2.2S and PdS.[2]
See also
References
- ^ a b c Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 1152. doi:10.1016/C2009-0-30414-6. ISBN 978-0-08-037941-8.
- ^ a b c d Grønvold, Fredrik; Røst, Erling (1956). "On the Sulfides, Selenides, and Tellurides of Palladium". Acta Chemica Scandinavica. 10: 1620–1634. doi:10.3891/acta.chem.scand.10-1620.
- ^ Selb, Elisabeth; Götsch, Thomas; Janka, Oliver; Penner, Simon; Heymann, Gunter (2017). "Crystal Structures of the High-Pressure Palladium Dichalcogenides Pd0.94(1)S2 and Pd0.88(1)Se2 Comprising Exceptional PdIV Oxidation States". Z. Anorg. Allg. Chem. 643 (21): 1415–1423. doi:10.1002/zaac.201700140.