Palladium disulfide is a chemical compound of palladium and sulfur with the chemical formula PdS2.[1]
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Names | |||
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Other names
Palladium(II) disulfide
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Identifiers | |||
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3D model (JSmol)
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Properties | |||
PdS2 | |||
Appearance | grey solid[1] or black crystalline powder[2] metallic crystals | ||
Related compounds | |||
Other anions
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PdSe2, PdTe2 | ||
Other cations
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PtS2, RuS2, IrS2 | ||
Related compounds
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PdS | ||
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 formed when palladium(II) sulfide is heated with an excess of sulfur.[1]
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]
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]
A variety of other compounds in the Pd-S system have been reported, including Pd4S, Pd2.8S, Pd2.2S and PdS.[2]