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:
 * KPH2 +  MeI   →   MePH2  +  KI

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