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<!-- Images --> <!-- Images -->
| Name = Ammonium pentasulfide | Name = Ammonium pentasulfide
| ImageFile = Ammonium pentasulfide.svg
| ImageFileL1 =
| ImageFileR1 = | ImageSize = 175px
| ImageAlt = <!-- Names --> | ImageAlt = <!-- Names -->
| IUPACName = diazanium;pentasulfide | IUPACName = diazanium;pentasulfide
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<!-- Sections --> <!-- Sections -->
| Section1 = {{Chembox Identifiers | Section1 = {{Chembox Identifiers
| CASNo = 12259-92-6 | CASNo = 12135-77-2
| ChemSpiderID = | ChemSpiderID =
| UNII = | UNII =
| DTXSID = DTXCID201333664 | DTXSID = DTXCID201333664
| EINECS = 235-223-4 | EINECS = 235-223-4
| PubChem = 138395104 | PubChem = 133108861
| StdInChI = InChI=1S/2H3N.5S/h2*1H3;;;;;/q;;5*-2/p+2 | InChI = 1S/2H3N.H2S5/c;;1-3-5-4-2/h2*1H3;1-2H
| StdInChIKey = BTMGSTQWMJHDHO-UHFFFAOYSA-P | InChIKey = PRPVKBZLCJDRNZ-UHFFFAOYSA-N
| SMILES = ...... | SMILES = ..SSS
}} }}
| Section2 = {{Chembox Properties | Section2 = {{Chembox Properties
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==Physical properties== ==Physical properties==
Ammonium tellurate forms yellow crystals, decomposing in water, of ], spatial group ''P 21/C'', cell parameters ''a'' = 0.5427 nm, ''b'' = 1.6226 nm, ''c'' = 0.9430 nm, β = 105.31°, Z = 4.<ref>{{cite journal |title=Crystal structure of diammoniumpentasulfide (NH4)2S5 |journal=] |date=1 January 1985 |volume=172 |issue=1-2 |pages=153–158 |doi=10.1524/zkri.1985.172.1-2.153 |url=https://www.degruyter.com/document/doi/10.1524/zkri.1985.172.1-2.153/html |access-date=14 January 2025 |language=en |issn=0044-2968}}</ref> Ammonium sulfide forms yellow crystals, decomposing in water, of ], spatial group ''P 21/C'', cell parameters ''a'' = 0.5427 nm, ''b'' = 1.6226 nm, ''c'' = 0.9430 nm, β = 105.31°, Z = 4.<ref>{{cite journal |title=Crystal structure of diammoniumpentasulfide (NH4)2S5 |journal=] |date=1 January 1985 |volume=172 |issue=1-2 |pages=153–158 |doi=10.1524/zkri.1985.172.1-2.153 |url=https://www.degruyter.com/document/doi/10.1524/zkri.1985.172.1-2.153/html |access-date=14 January 2025 |language=en |issn=0044-2968}}</ref>


The compound can be stored under the ] 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. The compound can be stored under the ] 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.

Revision as of 14:18, 14 January 2025

Ammonium pentasulfide
Names
IUPAC name diazanium;pentasulfide
Other names Diammonium pentasulfide
Identifiers
CAS Number
3D model (JSmol)
EC Number
  • 235-223-4
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/2H3N.H2S5/c;;1-3-5-4-2/h2*1H3;1-2HKey: PRPVKBZLCJDRNZ-UHFFFAOYSA-N
SMILES
  • ..SSS
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
Chemical compound

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, spatial group P 21/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

  1. Inorganic Syntheses, Volume 21. John Wiley & Sons. 22 September 2009. p. 15. ISBN 978-0-470-13287-6. Retrieved 14 January 2025.
  2. Brauer, Georg (2 December 2012). Handbook of Preparative Inorganic Chemistry V1. Elsevier. p. 369. ISBN 978-0-323-16127-5. Retrieved 14 January 2025.
  3. Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3802. ISBN 978-0-412-30120-9. Retrieved 14 January 2025.
  4. "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.
  5. 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.
Ammonium salts
Inorganic salts
monatomic anions
oxyanions
other anions
Organic salts
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