Phosphinous acid is the inorganic 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 of phosphine with ozone.[1] H2POH is mainly of pedagogical interest. Organophosphinous acids are more prevalent than the parent H2POH.
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| Other names
hydroxyphosphine
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| Identifiers | |
3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| H3OP | |
| Molar mass | 49.997 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Organophosphinous acids
editPhosphinous acids exist mainly as minor tautomers of secondary phosphine oxides. For example diphenylphosphinous acid, which is not detectable directly, is invoked as the tautomer of diphenylphosphine oxide.
Highly electron-withdrawing substituents stabilize the phosphinous acid tautomer as illustrated by (CF3)2POH.[2]
References
edit- ^ Withnall, Robert; Andrews, Lester (1987). "FTIR spectra of the photolysis products of the phosphine-ozone complex in solid argon". Journal of Physical Chemistry. 91 (4): 784–97. doi:10.1021/j100288a008.784-97&rft.date=1987&rft_id=info:doi/10.1021/j100288a008&rft.au=Withnall, Robert&rft.au=Andrews, Lester&rfr_id=info:sid/en.wikipedia.org:Phosphinous acid" class="Z3988">
- ^ Bader, Julia; Berger, Raphael J. F.; Stammler, Hans-Georg; Mitzel, Norbert W.; Hoge, Berthold (2011). "First Solid-State Structures of Real Diorganyl Phosphinous Acids R2POH (R=CF3, C2F5)". Chemistry - A European Journal. 17 (48): 13420–13423. doi:10.1002/chem.201102370. PMID 22052837.13420-13423&rft.date=2011&rft_id=info:doi/10.1002/chem.201102370&rft_id=info:pmid/22052837&rft.aulast=Bader&rft.aufirst=Julia&rft.au=Berger, Raphael J. F.&rft.au=Stammler, Hans-Georg&rft.au=Mitzel, Norbert W.&rft.au=Hoge, Berthold&rfr_id=info:sid/en.wikipedia.org:Phosphinous acid" class="Z3988">