Phosphorus tetroxide (original) (raw)

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Phosphorus tetroxide

Names
Other namesPhosphorus tetroxide Phosphorus(V) oxidePhosphoric anhydride
Identifiers
CAS Number 12137-38-1 checkY(P4O7): 12065-80-4(P4O8): 12037-06-8 ☒N(P4O9): 12037-11-5
3D model (JSmol) Interactive image(P4O7): Interactive image(P4O8): Interactive image(P4O9): Interactive image
ChemSpider 17287784 checkY(P4O7): 122796(P4O8): 122793(P4O9): 122794
PubChem CID 16131071(P4O7): 139226(P4O8): 139223(P4O9): 139224
CompTox Dashboard (EPA) DTXSID50153252 Edit this at Wikidata(P4O8): DTXSID10152822(P4O9): DTXSID70152823
InChI InChI=1S/O4P2/c1-5-4-6(2)3Key: PKSMWOJZXCKNBJ-UHFFFAOYSA-N(P4O7): InChI=1S/O7P4/c1-11-5-8-2-9(6-11)4-10(3-8)7-11Key: JXMJWGUWYVJTGA-UHFFFAOYSA-N(P4O8): InChI=1S/O8P4/c1-11-4-9-3-10(5-11)7-12(2,6-9)8-11Key: BDFGQAKHAFFJCF-UHFFFAOYSA-N(P4O9): InChI=1S/O9P4/c1-11-4-10-5-12(2,7-11)9-13(3,6-10)8-11Key: DKJKPKZTNXPRRP-UHFFFAOYSA-N
SMILES O=POP(=O)=O(P4O7): O=P12OP3OP(O1)OP(O3)O2(P4O8): O=P12OP3OP(O1)OP(=O)(O3)O2(P4O9): O=P12OP3OP(=O)(O1)OP(=O)(O3)O2
Properties
Chemical formula P2O4
Molar mass 125.96 g·mol−1
Appearance Solid
Melting point >100 °C
Vapor pressure 2.54 g·cm−3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chemical compound

Diphosphorus tetroxide, or phosphorus tetroxide is an inorganic compound of phosphorus and oxygen. It has the empirical chemical formula P2O4. Solid phosphorus tetroxide (also referred to as phosphorus(III,V)-oxide) consists of variable mixtures of the mixed-valence oxides P4O7, P4O8 and P4O9.[1][2][3]

Phosphorus tetroxide can be produced by thermal decomposition of phosphorus trioxide, which disproportionates above 210 °C to form phosphorus tetroxide, with elemental phosphorus as a byproduct:

8 P 2 O 3 ↽ − − ⇀ P 4 + 6 P 2 O 4 {\displaystyle {\ce {8P2O3 <=> P4 + 6P2O4}}} {\displaystyle {\ce {8P2O3 <=> P4 + 6P2O4}}}

In addition, phosphorus trioxide can be converted into phosphorus tetroxide by controlled oxidation with oxygen in carbon tetrachloride solution.[4][5][6]

Careful reduction of phosphorus pentoxide with red phosphorus at 450-525 °C also produces phosphorus tetroxide.

  1. ^ http://www.wiley.com/college/math/chem/cg/sales/voet.html. Archived 2016-03-03 at the Wayback Machine
  2. ^ Alberts B.; et al. (2002). Molecular Biology of the Cell, 4th Ed. Garland Science. ISBN 978-0-8153-4072-0.
  3. ^ Voet D., Voet J. G. (2004-03-09). Biochemistry, 3rd Ed. Wiley. ISBN 978-0-471-19350-0.
  4. ^ Atkins P., de Paula J. (2006). Physical chemistry, 8th Ed. San Francisco: W. H. Freeman. ISBN 978-0-7167-8759-4.
  5. ^ Petrucci, Ralph H.; Harwood, William S.; Herring, F. Geoffrey (2002). General chemistry: principles and modern applications (8th ed.). Upper Saddle River, N.J: Prentice Hall. ISBN 978-0-13-014329-7. LCCN 2001032331. OCLC 46872308.
  6. ^ Laidler K. J. (1978). Physical chemistry with biological applications. Benjamin/Cummings. Menlo Park. ISBN 978-0-8053-5680-9.{{[cite book](/wiki/Template:Cite%5Fbook "Template:Cite book")}}: CS1 maint: location missing publisher (link)