Phosphine oxide
![General formula of organophosphine oxides](/Images/godic/202502/02/Phosphine_oxide4721.png")
![Ball-And-Stick model of the parent compound phosphine oxide](/Images/godic/202502/02/Phosphine-oxide-from-MW-3D-balls4721.png")
Phosphine oxides are phosphorus compounds with the formula OPX3. When X = alkyl or aryl, these are organophosphine oxides. Triphenylphosphine oxide is an example. An inorganic phosphine oxide is phosphoryl chloride (POCl3). Such compounds are thermally stable, decomposing only above 450 °C. Phosphoryl refers to a functional group drawn with a phosphorus-oxygen double bond.