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Names | |
---|---|
IUPAC name
Phosphorus(IV) oxide
| |
Other names
Phosphorus dioxide
| |
Identifiers | |
3D model (
JSmol)
|
|
ChEBI | |
ChemSpider | |
1065 | |
PubChem
CID
|
|
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
O2P | |
Molar mass | 62.972 g·mol−1 |
ThermochemistryCRC Handbook of Chemistry and Physics, 2005 | |
Heat capacity (C)
|
39.5 joules (9.4 cal) per mole per K |
Std molar
entropy (S⦵298) |
252.1 joules (60.3 cal) per mole per K |
Std enthalpy of
formation (ΔfH⦵298) |
−279.9 joules (−66.9 cal) per mole |
Gibbs free energy (ΔfG⦵)
|
−281.6 joules (−67.3 cal) per mole |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Phosphorus dioxide (PO2) is a gaseous oxide of phosphorus. It is a free radical that plays a role in the chemiluminescence of phosphorus and phosphine. [1] It is produced when phosphates are heated to high temperatures. [2]
In the ground state the molecule is bent, like nitrogen dioxide, but there is an excited state that is linear. [1]
![]() | |
Names | |
---|---|
IUPAC name
Phosphorus(IV) oxide
| |
Other names
Phosphorus dioxide
| |
Identifiers | |
3D model (
JSmol)
|
|
ChEBI | |
ChemSpider | |
1065 | |
PubChem
CID
|
|
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
O2P | |
Molar mass | 62.972 g·mol−1 |
ThermochemistryCRC Handbook of Chemistry and Physics, 2005 | |
Heat capacity (C)
|
39.5 joules (9.4 cal) per mole per K |
Std molar
entropy (S⦵298) |
252.1 joules (60.3 cal) per mole per K |
Std enthalpy of
formation (ΔfH⦵298) |
−279.9 joules (−66.9 cal) per mole |
Gibbs free energy (ΔfG⦵)
|
−281.6 joules (−67.3 cal) per mole |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Phosphorus dioxide (PO2) is a gaseous oxide of phosphorus. It is a free radical that plays a role in the chemiluminescence of phosphorus and phosphine. [1] It is produced when phosphates are heated to high temperatures. [2]
In the ground state the molecule is bent, like nitrogen dioxide, but there is an excited state that is linear. [1]