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| | Section1 = {{Chembox Identifiers | | Section1 = {{Chembox Identifiers | ||
| | CASNo = 12135-77-2 | | CASNo = 12135-77-2 | ||
| | ChemSpiderID = | | ChemSpiderID = 95740767 | ||
| | UNII = | | UNII = | ||
| | DTXSID = DTXCID201333664 | | DTXSID = DTXCID201333664 | ||
Revision as of 20:21, 14 January 2025
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| Names | |
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| IUPAC name diazanium;pentasulfide | |
| Other names Diammonium pentasulfide | |
| Identifiers | |
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| Properties | |
| Chemical formula | H8N2S5 |
| Molar mass | 196.38 g·mol |
| Appearance | Yellow powder |
| Density | 1.6 g/cm |
| Solubility in water | decomposes in water |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references | |
Ammonium pentasulfide is a chemical compound with the chemical formula (NH4)2S5.
Synthesis
Passing hydrogen sulfide through a suspension of powdered sulfur in a concentrated ammonia solution:
- 2NH3 + H2S + 4S → (NH4)2S5
Physical properties
Ammonium sulfide forms yellow crystals, decomposing in water, of monoclinic system, space group P21/c, cell parameters a = 0.5427 nm, b = 1.6226 nm, c = 0.9430 nm, β = 105.31°, Z = 4.
The compound can be stored under the mother liquor without air access. When dry, it decomposes quickly in the air. the compound emits sulfur intensively in water and melts in a sealed ampoule at 95 °C to form a red liquid.
Chemical properties
The compound decomposes when stored in air or slightly heated:
- (NH4)2S5 → 2NH3 + H2S + 4S
References
- Inorganic Syntheses, Volume 21. John Wiley & Sons. 22 September 2009. p. 15. ISBN 978-0-470-13287-6. Retrieved 14 January 2025.
- Brauer, Georg (2 December 2012). Handbook of Preparative Inorganic Chemistry V1. Elsevier. p. 369. ISBN 978-0-323-16127-5. Retrieved 14 January 2025.
- Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3802. ISBN 978-0-412-30120-9. Retrieved 14 January 2025.
- "Crystal structure of diammoniumpentasulfide (NH4)2S5". Zeitschrift für Kristallographie. 172 (1–2): 153–158. 1 January 1985. doi:10.1524/zkri.1985.172.1-2.153. ISSN 0044-2968. Retrieved 14 January 2025.
- Steudel, Ralf (26 January 2004). Elemental Sulfur and Sulfur-Rich Compounds II. Springer. p. 133. ISBN 978-3-540-44951-5. Retrieved 14 January 2025.