Methylphosphine
Methylphosphine is the simplest organophosphorus compound with the formula CH3PH2, often written MePH2. It is a malodorous gas that condenses to a colorless liquid. It can be produced by methylation of phosphide salts:[1]
- KPH2 + MeI → MePH2 + KI
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| Other names
Methylphosphane | |
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| Properties | |
| CH3PH2 | |
| Molar mass | 48.02 |
| Appearance | colorless gas |
| Boiling point | -17.1 °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). | |
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Reactions
The compound exhibits the properties characteristic of a primary phosphine, i.e., a compound of the type RPH2. It can be oxidized to methylphosphonous acid:
- MePH2 + O2 → MeP(H)O2H
It protonates to give the phosphonium ion:
- MePH2 + H+ → MePH3+
With strong bases, it can be deprotonated to give methylphosphide derivatives:
- MePH2 + KOH → K[MePH] + H2O
References
- W. L. Jolly “Methylphosphine” Inorganic Syntheses 1968, volume 11, p. 124. doi:10.1002/9780470132425.ch25
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