Phosphine oxide

Phosphine oxide is the inorganic compound with the formula H₃PO. Although stable as a dilute gas, liquid or solid samples are unstable. Unlike many other compounds of the type PO_xH_y, H₃PO is rarely discussed and is not even mentioned in major sources on main group chemistry.

H₃PO has been detected by mass spectrometry as a reaction product of oxygen and phosphine, by means of FT-IR in a phosphine-ozone reaction

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Generation Phosphine oxide has been claimed as the product of a reaction of phosphine with vanadium oxytrichloride as well as with chromyl chloride. The product was obtained by matrix isolation. It has also been reported relatively stable in a water-ethanol solution by electrochemical oxidation of white phosphorus, where it slowly disproportionates into phosphine and hypophosphorous acid.

Phosphine oxide is reported as an intermediate in the room-temperature polymerization of phosphine and nitric oxide to solid P_xH_y.

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