{{Chembox | ImageFile = MePH2.png | ImageSize = 124 px | ImageAlt = | IUPACName = | OtherNames = Methylphosphane |Section1={{Chembox Identifiers | CASNo = 593-54-4 | PubChem = 68973 | ChemSpiderID = 62195 | SMILES = CP | InChI = 1/CH5P/c1-2/h2H2,1H3 | InChIKey = SAWKFRBJGLMMES-UHFFFAOYAG | StdInChI = 1S/CH5P/c1-2/h2H2,1H3 | StdInChIKey = SAWKFRBJGLMMES-UHFFFAOYSA-N | RTECS = | MeSHName = | ChEBI = 35887}} |Section2={{Chembox Properties | Formula = CH<sub>3</sub>PH<sub>2</sub> | MolarMass = 48.02 | Appearance = colorless gas | Density = | MeltingPtC = | BoilingPtC = -17.1 | Solubility = }} |Section3={{Chembox Hazards | MainHazards = toxic | FlashPt = | AutoignitionPt = }} }}
'''Methylphosphine''' is the simplest organophosphine compound with the formula CH<sub>3</sub>PH<sub>2</sub>, often written MePH<sub>2</sub>. It is a malodorous gas that condenses to a colorless liquid. It can be produced by methylation of phosphanide salts:<ref>{{cite book|author=W. L. Jolly|title=Inorganic Syntheses |chapter=Methylphosphine|year=1968| volume=11|page=124|doi=10.1002/9780470132425.ch25|isbn=978-0-470-13170-1 }}</ref> :KPH<sub>2</sub> + MeI → MePH<sub>2</sub> + KI
==Reactions== The compound exhibits the properties characteristic of a primary phosphine, i.e., a compound of the type RPH<sub>2</sub>. It can be oxidized to methylphosphonous acid: :MePH<sub>2</sub> + O<sub>2</sub> → MeP(H)O<sub>2</sub>H It protonates to give a phosphonium ion: :MePH<sub>2</sub> + H<sup>+</sup> → MePH<sub>3</sub><sup>+</sup> With strong bases, it can be deprotonated to give methylphosphanide derivatives: :MePH<sub>2</sub> + KOH → K[MePH] + H<sub>2</sub>O
==References== {{Reflist}}
Category:Phosphines Category:Foul-smelling chemicals Category:Methyl compounds Category:Organic compounds with 1 carbon atom