Phosphorus dioxide
- Formula: O2P
- Molecular weight: 62.9726
- IUPAC Standard InChI: InChI=1S/O2P/c1-3-2
- IUPAC Standard InChIKey: CJDZTJNITSFKRE-UHFFFAOYSA-N
- CAS Registry Number: 12164-97-5
- Chemical structure:
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Gas phase thermochemistry data
Go To: Top, Gas phase ion energetics data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -314.52 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1962 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 253.69 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1962 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 600. | 600. to 6000. |
|---|---|---|
| A | 11.26546 | 56.69278 |
| B | 135.7880 | 1.031604 |
| C | -159.4602 | -0.242217 |
| D | 70.27446 | 0.018741 |
| E | 0.175039 | -2.283770 |
| F | -322.0613 | -338.3555 |
| G | 234.2843 | 311.3126 |
| H | -314.5243 | -314.5243 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in September, 1962 | Data last reviewed in September, 1962 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
B - John E. Bartmess
View reactions leading to O2P+ (ion structure unspecified)
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 3.420 ± 0.010 | LPES | N/A | B |
| 3.80 ± 0.22 | R-A | Rudnyi, Vovk, et al., 1986 | value altered from reference due to conversion from electron convention to ion convention; B |
| 3.30 ± 0.20 | Endo | Wu and Tiernan, 1982 | B |
| 2.99997 | IMRE | Wormhoudt and Kobb, 1979 | B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 11.9 ± 0.5 | EI | Balducci, Gigli, et al., 1981 | LLK |
| 10.5 ± 0.1 | EI | Gingerich and Miller, 1975 | LLK |
| 11.5 ± 0.5 | EI | Smoes and Drowart, 1973 | LLK |
| 11. ± 1. | EI | Drowart, Myers, et al., 1972 | LLK |
References
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Rudnyi, Vovk, et al., 1986
Rudnyi, E.B.; Vovk, O.M.; Sidirov, L.N.; Sorokin, I.D.; Alikhanyan, A.S.,
Enthalpy of formation of PO2-, PO3-, and NaPO2,
High Temp., 1986, 24, 56. [all data]
Wu and Tiernan, 1982
Wu, R.L.C.; Tiernan, T.O.,
Collisional Studies of High Temperature Molecular Negative Ion-Neutral Reactions,
Bull. Am. Phys. Soc., 1982, 27, 109. [all data]
Wormhoudt and Kobb, 1979
Wormhoudt, J.C.; Kobb, C.E.,
MS determination of negative and positive ion concentrations in coal fired MHD plasmas in Proc. 10th Materials Res. Symp. on Characterization of High Temp. Vapors,
NBS Spec. Publ. U.S., 1979, 457. [all data]
Balducci, Gigli, et al., 1981
Balducci, G.; Gigli, G.; Guido, M.,
Dissociation energies of the molecules CrPO2(g) and CoO(g) by high-temperature mass spectrometry,
J. Chem. Soc. Faraday Trans. 2, 1981, 77, 1107. [all data]
Gingerich and Miller, 1975
Gingerich, K.A.; Miller, F.,
Thermodynamic study of gaseous sodium-phosphorus-oxygen ternary molecules by high temperature mass spectrometry,
J. Chem. Phys., 1975, 63, 1211. [all data]
Smoes and Drowart, 1973
Smoes, S.; Drowart, J.,
Atomization energies of phosphorus oxides,
Faraday Symp. Chem. Soc., 1973, 139. [all data]
Drowart, Myers, et al., 1972
Drowart, J.; Myers, C.E.; Szwarc, R.; Vander Auwera-Mahieu, A.; Uy, O.M.,
Determination by the mass spectrometric Knudsen cell method of the atomization energies of the molecules PO and PO2,
J. Chem. Soc. Faraday Trans. 2, 1972, 68, 1749. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
EA Electron affinity S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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