Potassium hydrosulfide
Names
IUPAC name
Potassium hydrosulfide
Other names
Potassium bisulfide, Potassium sulfhydrate, potassium hydrogen sulfide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.803
EC Number
  • 215-182-9
UNII
  • InChI=1S/K.H2S/h;1H2/q+1;/p-1 ☒N
    Key: ZOCLAPYLSUCOGI-UHFFFAOYSA-M ☒N
  • InChI=1/K.H2S/h;1H2/q+1;/p-1
    Key: ZOCLAPYLSUCOGI-REWHXWOFAJ
  • [SH-].[K+]
Properties
KSH
Molar mass 72.171 g/mol
Appearance white solid
Density 1.68–1.70 g/cm3
Melting point 455 °C (851 °F; 728 K)
good
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Flammable solid, stench, releases hydrogen sulfide
NFPA 704 (fire diamond)
NFPA 704 four-colored diamond
3
2
0
Related compounds
Other anions
 Potassium hydroxide
Other cations
 Sodium hydrosulfide
Related compounds
 potassium sulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)
Infobox references

Potassium hydrosulfide is the inorganic compound with the formula KSH. This colourless salt consists of the cation K+ and the bisulfide anion [SH]−. It is the product of the half-neutralization of hydrogen sulfide with potassium hydroxide. The compound is used in the synthesis of some organosulfur compounds.[1] Aqueous solutions of potassium sulfide consist of a mixture of potassium hydrosulfide and potassium hydroxide.

The structure of the potassium hydrosulfide resembles that for potassium chloride. Their structure is however complicated by the non-spherical symmetry of the SH− anions, but these tumble rapidly in the solid.[2]

Addition of sulfur gives dipotassium pentasulfide.

Synthesis

It is prepared by neutralizing aqueous KOH with H2S.[3][4]

References

  1. ↑ Dittmer, Donald C. (2001). "Potassium Hydrogen Sulfide". In Paquette, L. (ed.). Encyclopedia of Reagents for Organic Synthesis. J. Wiley & Sons, New York. doi:10.1002/047084289X.rp227. ISBN 0471936235.
  2. ↑ Haarmann, F; Jacobs, H.; Roessler, E.; Senker, J. (2002). "Dynamics of Anions and Cations in Hydrogensulfides of Alkali Metals (NaHS, KHS, RbHS): A Proton Nuclear Magnetic Resonance Study". Journal of Chemical Physics. 117 (3): 1269–1276. Bibcode:2002JChPh.117.1269H. doi:10.1063/1.1483860.
  3. ↑ Kurzer, F.; Lawson, A. (1962). "Thiobenzoylthioglycolic Acid". Organic Syntheses. 42: 100. doi:10.15227/orgsyn.042.0100.
  4. ↑ Robert L. Frank and James R. Blegen (1948). "Benzoyl Disulfide". Organic Syntheses. 28: 16. doi:10.15227/orgsyn.028.0016.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.