Potassium hydrosulfide
| Potassium hydrosulfide | |
|---|---|
 |
|
|
Potassium hydrosulfide |
|
|
Other names
Potassium bisulfide, Potassium sulfhydrate, potassium hydrogen sulfide |
|
| Identifiers | |
| CAS number | 1310-61-8  |
| PubChem | 102109 |
| EC number | 215-182-9 |
| Jmol-3D images | Image 1 |
|
|
|
|
| Properties | |
| Molecular formula | HKS |
| Molar mass | 72.171 g/mol |
| Appearance | white solid |
| Density | 1.68–1.70 g/cm3 |
| Melting point |
455 ºC |
| Solubility in water | good |
| Hazards | |
| EU Index | Not listed |
| Main hazards | Flammable solid, stench, releases hydrogen sulfide |
| NFPA 704 |
 2
3
0
|
| Related compounds | |
| Other anions | Potassium hydroxide |
| Other cations | Sodium hydrosulfide |
| Related compounds | potassium sulfide |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
|
| Infobox references | |
Potassium hydrosulfide is the inorganic compound with the formula KHS. 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] It is prepared by neutralizing aqueous KOH with H2S.[2] 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 high temperatures.[3]
Addition of sulfur gives dipotassium pentasulfide.
[edit] References
- ^ Dittmer, D. C. “Potassium Hydrogen Sulfide” in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. doi: 10.1002/047084289.
- ^ Kurzer, F. Lawson, A. “Thiobenzoylthioglycolic Acid” Organic Syntheses, Collected Volume 5, p.1046 (1973). [1]
- ^ 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. doi:10.1063/1.1483860.
