Palladium disulfide
- 12137-75-6 checkY
- InChI=1S/Pd.S2/c;1-2/q+2;-2Key: ZMOVFMLVWHDWBO-UHFFFAOYSA-N
- [S-][S-].[Pd+2]
Palladium disulfide is a chemical compound of palladium and sulfur with the chemical formula PdS2.[1]
Preparation
[edit ]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]
Structure
[edit ]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]
Related compounds
[edit ]A variety of other compounds in the Pd-S system have been reported, including Pd4S, Pd2.8S, Pd2.2S and PdS.[2]
See also
[edit ]References
[edit ]- ^ a b c Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 1152. 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 .