phosphine oxide

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| CASNo = 13840-40-9

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| PubChem = 57448882

| StdInChI=1S/H3OP/c1-2/h2H3

| StdInChIKey = MPQXHAGKBWFSNV-UHFFFAOYSA-N

| SMILES = [O-][PH3+]

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| P = 1|H = 3|O= 1

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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.{{Greenwood&Earnshaw2nd|page 510}}

H₃PO has been detected by mass spectrometry as a reaction product of oxygen and phosphine,{{cite journal | last1 = Hamilton | first1 = Peter A. | last2 = Murrells | first2 = Timothy P. | year = 1985 | title = Kinetics and mechanism of the reactions of PH3 with O(3P) and N(4S) atoms| journal = J. Chem. Soc., Faraday Trans. | volume = 2 | issue = 81| pages = 1531–1541 | doi = 10.1039/F29858101531}} by means of FT-IR in a phosphine-ozone reaction{{cite journal | last1 = Withnall | first1 = Robert | last2 = Andrews | first2 = Lester | year = 1987 | title = FTIR spectra of the photolysis products of the phosphine-ozone complex in solid argon| journal = J. Phys. Chem. | volume = 91 | issue = 4| pages = 784–797 | doi = 10.1021/j100288a008}}

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.{{cite journal | last1 = Kayser | first1 = David A. | last2 = Ault | first2 = Bruce S. | year = 2003 | title = Matrix Isolation and Theoretical Study of the Photochemical Reaction of PH3 with OVCl3 and CrCl2O2| journal = J. Phys. Chem. A | volume = 107 | issue = 33| pages = 6500–6505 | doi = 10.1021/jp022692e | bibcode = 2003JPCA..107.6500K}} 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.{{cite journal | last1 = Yakhvarov | first1 = D. | last2 = Caporali | first2 = M. | last3 = Gonsalvi | first3 = L. | last4 = Latypov | first4 = S. | last5 = Mirabello | first5 = V. | last6 = Rizvanov | first6 = I. | last7 = Sinyashin | first7 = O. | last8 = Stoppioni | first8 = P. | last9 = Peruzzini | first9 = M. | year = 2011 | title = Experimental Evidence of Phosphine Oxide Generation in Solution and Trapping by Ruthenium Complexes | journal = Angewandte Chemie International Edition | volume = 50 | issue = 23 | pages = 5370–5373 | doi = 10.1002/anie.201100822 | pmid=21538749}}

Phosphine oxide is reported as an intermediate in the room-temperature polymerization of phosphine and nitric oxide to solid P_xH_y.{{cite journal | last1 = Zhao | first1 = Yi-Lei | last2 = Flora | first2 = Jason W. | last3 = David Thweatt | first3 = William | last4 = Garrison | first4 = Stephen L. | last5 = Gonzalez | first5 = Carlos | last6 = Houk | first6 = K. N. | last7 = Marquez | first7 = Manuel | year = 2009 | title = Phosphine Polymerization by Nitric Oxide: Experimental Characterization and Theoretical Predictions of Mechanism|journal = Inorg. Chem. | volume = 48 | issue = 3| pages = 1223–1231 | doi = 10.1021/ic801917a| pmid = 19102679 }}

phosphine oxide

Generation

Further reading

References