 | |
| Names | |
|---|---|
| Other names hydroxyphosphine | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
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| Properties | |
| H3OP | |
| Molar mass | 49.997 g·mol−1 |
| Related compounds | |
Related compounds | Hydroxylamine |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Phosphinous acid is theinorganic compound with the formula H2POH. It exists, fleetingly, as a mixture with its less stable tautomer H3PO (phosphine oxide). This mixture has been generated by low temperature oxidation ofphosphine withozone.[1] H2POH is mainly of pedagogical interest. Organophosphinous acids are more prevalent than the parent H2POH.
Phosphinous acids exist mainly as minor tautomers ofsecondary phosphine oxides. For example diphenylphosphinous acid, which is not detectable directly, is invoked as the tautomer ofdiphenylphosphine oxide.
Highly electron-withdrawing substituents stabilize the phosphinous acid tautomer as illustrated by (CF3)2POH.[2]
