Dimethylphosphine
 | |
| Names | |
|---|---|
| Other names
dimethylphosphane | |
| Identifiers | |
| 676-59-5 | |
| Properties | |
| C2H7P | |
| Molar mass | 62.05 |
| Appearance | colorless gas |
| Boiling point | 21.1 °C |
| Hazards | |
| Main hazards | toxic |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Dimethylphosphine is the organophosphorus compound with the formula (CH3)2PH, often written Me2PH. It is a malodorous gas that condenses to a colorless liquid just below room temperature. Although it can be produced by methylation of phosphine, a more practical synthesis involves the reduction of tetramethyldiphosphine disulfide with tributylphosphine:[1]
- [Me2P(S)]2 + PBu3 + H2O → Me2PH + SPBu3 + Me2P(O)H
Reactions
The compound exhibits the properties characteristic of a secondary phosphine, i.e., a compound of the type R2PH. It can be oxidized to the phosphinic acid:
- Me2PH + O2 → Me2PO2H
It protonates to give the phosphonium ion:
- Me2PH + H+ → Me2PH2+
With strong bases, it can be deprotonated to give dimethylphosphide derivatives:
- Me2PH + LiNH2 → Me2PLi + NH3
References
- ↑ A. Trenkle, H. Vahrenkamp “Dimethylphosphine” Inorganic Syntheses 1982, volume 21, p. 180. doi:10.1002/9780470132524.ch40
This article is issued from Wikipedia - version of the 5/22/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.