Boron sulfide
From Wikipedia, the free encyclopedia
| Boron sulfide | |
|---|---|
| Image:Boron sulfide.jpg | |
| General | |
| Systematic name | Boron sulfide |
| Other names | Boron trisulfide |
| Molecular formula | B2S3 |
| SMILES | ? |
| Molar mass | 117.80 g/mol |
| Appearance | colorless crystals |
| CAS number | [12007-33-9] |
| Properties | |
| Density and phase | 1.55 g/cm3, solid |
| Solubility in water | decomposes |
| Other solvents | insoluble in all solvents |
| Melting point | 563 °C |
| Boiling point | ? °C (? K) |
| Structure | |
| Coordination geometry |
B: planar, sp2 |
| Crystal structure | monoclinic |
| Hazards | |
| MSDS | External MSDS |
| Main hazards | ? |
| NFPA 704 | |
| Flash point | ? °C |
| R/S statement | R: ? S: ? |
| RTECS number | ? |
| Supplementary data page | |
| Structure and properties |
n, εr, etc. |
| Thermodynamic data |
Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Other anions | ? |
| Other cations | ? |
| Related ? | ? |
| Related compounds | BCl3 Lawesson’s reagent |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
|
Boron sulfide is the chemical compound with the formula B2S3. This is a polymeric material that has been of interest as a component of “high-tech” glasses and as a reagent for preparing organosulfur compounds. Like the sulfides of silicon and phosphorus, B2S3 reacts with water, including atmospheric moisture to release H2S. Thus, samples must be handled under anhydrous conditions.
Like the boron oxides, B2S3 readily forms glasses when blended with other sulfides such as P4S10. Such glasses absorb only low frequencies of Infra-red energy, in contrast to convention borosilicate glasses.
B2S3 converts ketones into the corresponding thiones. An idealized equation for such a transformation is:
- B2S3 + 3 (C6H5)2C=O → B2O3 + 3 (C6H5)2C=S
In practice, B2S3 would be used in excess.[1]
[edit] References
- ^ Sato, R. "Boron trisulfide" in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. DOI: 10.1002/047084289.
