Phosphorus tetroxide

Phosphorus tetroxide
Names
	Other names Phosphorus tetroxide ; Phosphorus(V) oxide; Phosphoric anhydride
Identifiers
CAS Number	12137-38-1 ; (P4O7): 12065-80-4; (P4O8): 12037-06-8 ; (P4O9): 12037-11-5;
3D model (JSmol)	Interactive image; (P4O7): Interactive image; (P4O8): Interactive image; (P4O9): Interactive image;
ChemSpider	17287784 ; (P4O7): 122796; (P4O8): 122793; (P4O9): 122794;
PubChem CID	16131071; (P4O7): 139226; (P4O8): 139223; (P4O9): 139224;
CompTox Dashboard (EPA)	DTXSID50153252 ; (P4O8): DTXSID10152822; (P4O9): DTXSID70152823;
	InChI InChI=1S/O4P2/c1-5-4-6(2)3 Key: PKSMWOJZXCKNBJ-UHFFFAOYSA-N; (P4O7): InChI=1S/O7P4/c1-11-5-8-2-9(6-11)4-10(3-8)7-11 Key: JXMJWGUWYVJTGA-UHFFFAOYSA-N; (P4O8): InChI=1S/O8P4/c1-11-4-9-3-10(5-11)7-12(2,6-9)8-11 Key: BDFGQAKHAFFJCF-UHFFFAOYSA-N; (P4O9): InChI=1S/O9P4/c1-11-4-10-5-12(2,7-11)9-13(3,6-10)8-11 Key: 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

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]

Preparation

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 P₂O₃ ⇌ P₄ + 6 P₂O₄

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.

References

^ http://www.wiley.com/college/math/chem/cg/sales/voet.html. Archived 2016-03-03 at the Wayback Machine
^ Alberts B.; et al. (2002). Molecular Biology of the Cell, 4th Ed. Garland Science. ISBN 978-0-8153-4072-0.
^ Voet D., Voet J. G. (2004-03-09). Biochemistry, 3rd Ed. Wiley. ISBN 978-0-471-19350-0.
^ Atkins P., de Paula J. (2006). Physical chemistry, 8th Ed. San Francisco: W. H. Freeman. ISBN 978-0-7167-8759-4.
^ 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.
^ Laidler K. J. (1978). Physical chemistry with biological applications. Benjamin/Cummings. Menlo Park. ISBN 978-0-8053-5680-9.{{cite book}}: CS1 maint: location missing publisher (link)

[1] ttp://www.wiley.com/college/math/chem/cg/sales/voet.html. Archived 2016-03-03 at the Wayback Machine

[Alberts-2] Alberts B.; et al. (2002). Molecular Biology of the Cell, 4th Ed. Garland Science. ISBN 978-0-8153-4072-0.

[Volet-Volet-3] Voet D., Voet J. G. (2004-03-09). Biochemistry, 3rd Ed. Wiley. ISBN 978-0-471-19350-0.

[Atkins-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.

[Laider-6] Laidler K. J. (1978). Physical chemistry with biological applications. Benjamin/Cummings. Menlo Park. ISBN 978-0-8053-5680-9.{{cite book}}: CS1 maint: location missing publisher (link)

[1]

[2]

[3]

[4]

[5]

[6]

v t e Phosphorus compounds
Phosphides	AlP AsP BP BiP Cs₂P₅ Ca₃P₂ Cd₃P₂ Cu₃P DyP ErP EuP GdP AuP FeP Fe₃P HfP HoP InP LaP Li₃P LuP MoP MoP₂ Mo₃P NbP NdP NpP Np₃P₄ OsP₂ Ru₂P PtP₂ PrP PrP₅ PuP ScP SmP SmP₅ Sr₃P₂ TbP SnP₃ ThP₇ TmP YP YbP ZnP₂ Zn₃P₂ ZrP ZrP₂
Other compounds	PBr₃ PBr₅ PBr₇ PCl₃ PCl₅ P₂Cl₄ PF₃ PF₅ PI₃ PH₃ PN P₃N₅ PO P₂O₃ P₂O₄ P₂O₅ P₄S₃ P₄S_x P₄S₁₀

Phosphorus tetroxide

Phosphorus tetroxide

Phosphorus tetroxide

Add your contribution

Hub overview

Root Wikipedia Article

Phosphorus tetroxide

Preparation

References

Names
Other names Phosphorus tetroxide Phosphorus(V) oxide Phosphoric anhydride
Identifiers
CAS Number	12137-38-1^Y (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^Y (P₄O₇): 122796 (P₄O₈): 122793 (P₄O₉): 122794
PubChem CID	16131071 (P₄O₇): 139226 (P₄O₈): 139223 (P₄O₉): 139224
CompTox Dashboard (EPA)	DTXSID50153252 (P₄O₈): DTXSID10152822 (P₄O₉): DTXSID70152823
InChI InChI=1S/O4P2/c1-5-4-6(2)3 Key: PKSMWOJZXCKNBJ-UHFFFAOYSA-N (P₄O₇): InChI=1S/O7P4/c1-11-5-8-2-9(6-11)4-10(3-8)7-11 Key: JXMJWGUWYVJTGA-UHFFFAOYSA-N (P₄O₈): InChI=1S/O8P4/c1-11-4-9-3-10(5-11)7-12(2,6-9)8-11 Key: BDFGQAKHAFFJCF-UHFFFAOYSA-N (P₄O₉): InChI=1S/O9P4/c1-11-4-10-5-12(2,7-11)9-13(3,6-10)8-11 Key: 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