Oxygen
- Formula: O2
- Molecular weight: 31.9988
- IUPAC Standard InChIKey: MYMOFIZGZYHOMD-UHFFFAOYSA-N
- CAS Registry Number: 7782-44-7
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Molecular oxygen; Oxygen molecule; Pure oxygen; O2; Liquid oxygen; UN 1072; UN 1073; Dioxygen
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Phase change data
- Reaction thermochemistry data: reactions 51 to 70
- Henry's Law data
- Ion clustering data
- Constants of diatomic molecules
- Fluid Properties
- Data at other public NIST sites:
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Gas phase thermochemistry data
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), 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 |
---|---|---|---|---|---|
S°gas,1 bar | 205.152 ± 0.005 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
S°gas,1 bar | 205.15 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1977 |
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) | 100. to 700. | 700. to 2000. | 2000. to 6000. |
---|---|---|---|
A | 31.32234 | 30.03235 | 20.91111 |
B | -20.23531 | 8.772972 | 10.72071 |
C | 57.86644 | -3.988133 | -2.020498 |
D | -36.50624 | 0.788313 | 0.146449 |
E | -0.007374 | -0.741599 | 9.245722 |
F | -8.903471 | -11.32468 | 5.337651 |
G | 246.7945 | 236.1663 | 237.6185 |
H | 0.0 | 0.0 | 0.0 |
Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 |
Comment | Data last reviewed in March, 1977; New parameter fit January 2009 | Data last reviewed in March, 1977; New parameter fit January 2009 | Data last reviewed in March, 1977; New parameter fit January 2009 |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), 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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Reactions 1 to 50
By formula: O2- + O2 = (O2- • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 48. ± 20. | kJ/mol | AVG | N/A | Average of 5 out of 7 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 102. | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrS° | 130. | J/mol*K | PHPMS | Conway and Nesbit, 1968 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 13. ± 4.6 | kJ/mol | TDAs | Hiraoka, 1888 | gas phase; see also Sherwood, Hanold, et al., 1996. Aquino, Taylor, et al., 2001 calns indicate rectangular anion; B |
ΔrG° | 23. ± 4.2 | kJ/mol | IMRE | Payzant J.D. and Kebarle, 1972 | gas phase; B |
ΔrG° | 13. ± 4.2 | kJ/mol | IMRE | Pack and Phelps, 1971 | gas phase; B |
ΔrG° | 16.7 ± 2.1 | kJ/mol | IMRE | Parkes, 1971 | gas phase; B |
ΔrG° | 16. ± 4.2 | kJ/mol | TDAs | Conway and Nesbit, 1968 | gas phase; B |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
15. | 300. | DT | Pack and Phelps, 1971 | gas phase; M |
By formula: O2+ + O2 = (O2+ • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 41. ± 5. | kJ/mol | AVG | N/A | Average of 5 out of 6 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 78.7 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrS° | 104.7 | J/mol*K | PHPMS | Conway and Janik, 1970 | gas phase; M |
ΔrS° | 84. | J/mol*K | PHPMS | Durden, Kebarle, et al., 1969 | gas phase; M |
ΔrS° | 86.2 | J/mol*K | PHPMS | Yang and Conway, 1964 | gas phase; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
16. | 300. | DT | Rakshit and Warneck, 1981 | gas phase; M |
14. | 300. | DT | Rakshit and Warneck, 1980 | gas phase; M |
14. | 296. | FA | Howard, Bierbaum, et al., 1972 | gas phase; M |
25. | 200. | FA | Adams and Bohme, 1970 | gas phase; M |
By formula: (HO2+ • 2O2) + O2 = (HO2+ • 3O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrH° | 13. | kJ/mol | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 76.6 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrS° | 84. | J/mol*K | N/A | Hiraoka, Saluja, et al., 1979 | gas phase; Entropy change calculated or estimated; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
4.6 | 105. | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; Entropy change calculated or estimated; M |
By formula: (O2- • 7N2 • O2) + N2 = (O2- • 8N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7. ± 1. | kJ/mol | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
ΔrH° | 6.40 | kJ/mol | PHPMS | Hiraoka, 1988, 2 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 74.9 | J/mol*K | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
ΔrS° | 75.3 | J/mol*K | N/A | Hiraoka, 1988, 2 | gas phase; Entropy change calculated or estimated; M |
By formula: O- + O2 = (O- • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 130. | kJ/mol | PDiss | Hiller and Vestal, 1981 | gas phase; From thermochemical cycle, ΔrH<; M |
ΔrH° | 163. | kJ/mol | PES | Novich, Engelking, et al., 1979 | gas phase; From thermochemical cycle, from EA(O3), D(O-O2) AND EA(O); M |
ΔrH° | 160. | kJ/mol | PDiss | Cosby, Moseley, et al., 1978 | gas phase; M |
ΔrH° | 180. | kJ/mol | CID | Lifschitz, Wu, et al., 1978 | gas phase; M |
By formula: (O2+ • O2) + O2 = (O2+ • 2O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 25. ± 1. | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrH° | 28.7 ± 0.3 | kJ/mol | PHPMS | Conway and Janik, 1970 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 110. | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrS° | 133.0 | J/mol*K | PHPMS | Conway and Janik, 1970 | gas phase; M |
By formula: (HO2+ • O2) + O2 = (HO2+ • 2O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 29. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrH° | 28. | kJ/mol | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 96.7 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrS° | 92. | J/mol*K | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
By formula: (O2+ • 3O2) + O2 = (O2+ • 4O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 9.0 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrH° | 10.3 ± 0.75 | kJ/mol | PHPMS | Conway and Janik, 1970 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 88.7 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrS° | 100. | J/mol*K | PHPMS | Conway and Janik, 1970 | gas phase; M |
By formula: (O2+ • 2O2) + O2 = (O2+ • 3O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 10.4 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrH° | 10.6 ± 0.4 | kJ/mol | PHPMS | Conway and Janik, 1970 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 78.2 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrS° | 82.8 | J/mol*K | PHPMS | Conway and Janik, 1970 | gas phase; M |
By formula: (O2+ • 4O2) + O2 = (O2+ • 5O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8.0 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrH° | 8. ± 3. | kJ/mol | PHPMS | Conway and Janik, 1970 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 89.5 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
ΔrS° | 71.1 | J/mol*K | PHPMS | Conway and Janik, 1970 | gas phase; M |
By formula: O3- + O2 = (O3- • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8.79 ± 0.84 | kJ/mol | TDAs | Hiraoka, 1988, 2 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 79.5 | J/mol*K | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -15.1 ± 2.1 | kJ/mol | TDAs | Hiraoka, 1988, 2 | gas phase; B |
By formula: NO- + O2 = (NO- • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 12.1 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Yamabe, 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 60.7 | J/mol*K | PHPMS | Hiraoka and Yamabe, 1991 | gas phase; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
-2. | 200. | FA | Dunkin, Fehsenfeld, et al., 1971 | gas phase; DG>; M |
By formula: (O2- • 6O2) + O2 = (O2- • 7O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 5.86 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 67. | J/mol*K | N/A | Hiraoka, 1988 | gas phase; Entropy change calculated or estimated; M |
By formula: (O2+ • 7O2) + O2 = (O2+ • 8O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.61 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 92. | J/mol*K | N/A | Hiraoka, 1988 | gas phase; Entropy change calculated or estimated; M |
By formula: (O2+ • O2) + N2 = (O2+ • N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 12. | kJ/mol | HPMS | Speller and Fitaire, 1983 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 42.3 | J/mol*K | HPMS | Speller and Fitaire, 1983 | gas phase; Entropy change is questionable; M |
By formula: (H3+ • O2) + O2 = (H3+ • 2O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 48.1 | kJ/mol | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; From thermochemical cycle(O2H+)O2; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 92. | J/mol*K | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; From thermochemical cycle(O2H+)O2; M |
By formula: (O3- • 4O2) + O2 = (O3- • 5O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6.44 | kJ/mol | PHPMS | Hiraoka, 1988, 2 | gas phase; ΔrH, ΔrS approximate; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 68.6 | J/mol*K | PHPMS | Hiraoka, 1988, 2 | gas phase; ΔrH, ΔrS approximate; M |
By formula: H3+ + O2 = (H3+ • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 52.3 | kJ/mol | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; From thermochemical cycle(O2H+)O2; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 82.0 | J/mol*K | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; From thermochemical cycle(O2H+)O2; M |
(O2S- • 2 •
) +
= (O2S- • 3
•
)
By formula: (O2S- • 2O2S • O2) + O2S = (O2S- • 3O2S • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 15.1 ± 1.7 | kJ/mol | TDAs | Vacher, Jorda, et al., 1992 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 6. ± 13. | kJ/mol | TDAs | Vacher, Jorda, et al., 1992 | gas phase; B |
By formula: (O2S- • O2S • O2) + O2S = (O2S- • 2O2S • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 19.2 ± 1.7 | kJ/mol | TDAs | Vacher, Jorda, et al., 1992 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 10. ± 8.4 | kJ/mol | TDAs | Vacher, Jorda, et al., 1992 | gas phase; B |
By formula: (O3S- • O2S • O2) + O2S = (O3S- • 2O2S • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 23.8 ± 2.5 | kJ/mol | TDAs | Vacher, Jorda, et al., 1992 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 15. ± 8.8 | kJ/mol | TDAs | Vacher, Jorda, et al., 1992 | gas phase; B |
By formula: O+ + O2 = (O+ • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 179. | kJ/mol | PDiss | Hiller and Vestal, 1982 | gas phase; M |
ΔrH° | 200. | kJ/mol | PI | Linn, Ono, et al., 1981 | gas phase; M |
ΔrH° | 209. | kJ/mol | PDiss | Mosely, Ozenne, et al., 1981 | gas phase; M |
By formula: (O3S- • O2) + O2S = (O3S- • O2S • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 27.2 ± 3.3 | kJ/mol | TDAs | Vacher, Jorda, et al., 1992 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 18. ± 9.2 | kJ/mol | TDAs | Vacher, Jorda, et al., 1992 | gas phase; B |
By formula: (O2S- • O2) + O2S = (O2S- • O2S • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 46.0 ± 4.2 | kJ/mol | TDAs | Vacher, Jorda, et al., 1992 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 26. ± 9.2 | kJ/mol | TDAs | Vacher, Jorda, et al., 1992 | gas phase; B |
By formula: (O2- • 2N2 • O2) + N2 = (O2- • 3N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 10.3 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 76.6 | J/mol*K | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
By formula: (O2- • 3N2 • O2) + N2 = (O2- • 4N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 9.0 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 78.2 | J/mol*K | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
By formula: (O2- • 4N2 • O2) + N2 = (O2- • 5N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8.1 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 81.6 | J/mol*K | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
By formula: (O2- • 5N2 • O2) + N2 = (O2- • 6N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.6 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 81.6 | J/mol*K | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
By formula: (O2- • 6N2 • O2) + N2 = (O2- • 7N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.1 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 78.7 | J/mol*K | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
By formula: (O2- • N2 • O2) + N2 = (O2- • 2N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11.7 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 74.9 | J/mol*K | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
By formula: (NO- • 2O2) + O2 = (NO- • 3O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11.8 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Yamabe, 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 65.7 | J/mol*K | PHPMS | Hiraoka and Yamabe, 1991 | gas phase; M |
By formula: (NO- • 3O2) + O2 = (NO- • 4O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 10.2 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Yamabe, 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 67.4 | J/mol*K | PHPMS | Hiraoka and Yamabe, 1991 | gas phase; M |
By formula: (NO- • 4O2) + O2 = (NO- • 5O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 9.8 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Yamabe, 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 80.3 | J/mol*K | PHPMS | Hiraoka and Yamabe, 1991 | gas phase; M |
By formula: (NO- • O2) + O2 = (NO- • 2O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 12.1 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Yamabe, 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 65.7 | J/mol*K | PHPMS | Hiraoka and Yamabe, 1991 | gas phase; M |
By formula: (HO2+ • 3O2) + O2 = (HO2+ • 4O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 88.3 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (HO2+ • 4O2) + O2 = (HO2+ • 5O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 9. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 91.6 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (HO2+ • 5O2) + O2 = (HO2+ • 6O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 93.3 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (HO2+ • 6O2) + O2 = (HO2+ • 7O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 94.1 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (HO2+ • 7O2) + O2 = (HO2+ • 8O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 88.3 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (HO2+ • 8O2) + O2 = (HO2+ • 9O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 86.2 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (HO2+ • O2) + H2 = (HO2+ • H2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 17. | kJ/mol | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 71. | J/mol*K | PHPMS | Hiraoka, Saluja, et al., 1979 | gas phase; M |
By formula: (O2- • O2) + N2 = (O2- • N2 • O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 12.0 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 69.0 | J/mol*K | PHPMS | Hiraoka, 1988, 2 | gas phase; M |
By formula: 2C2H6S + O2 = 2C2H6OS
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -277.7 ± 0.84 | kJ/mol | Cm | Douglas, 1946 | liquid phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -278.3 ± 0.8 kJ/mol; At 291°K; ALS |
By formula: C2H6O2S = C2H6OS + 0.5O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 243.3 ± 0.84 | kJ/mol | Cm | Douglas, 1946 | liquid phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 246.9 ± 0.8 kJ/mol; At 291°K; ALS |
By formula: (O2- • 2O2) + O2 = (O2- • 3O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 10.0 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 89.1 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
By formula: (O2- • 3O2) + O2 = (O2- • 4O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7. ± 1. | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 64.4 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
By formula: (O2- • 4O2) + O2 = (O2- • 5O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6.4 ± 0.8 | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 64.4 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
By formula: (O2- • 5O2) + O2 = (O2- • 6O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6. ± 1. | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 67.8 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
By formula: (O2+ • 5O2) + O2 = (O2+ • 6O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8. ± 1. | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 90.8 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
By formula: (O2+ • 6O2) + O2 = (O2+ • 7O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8. ± 2. | kJ/mol | PHPMS | Hiraoka, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 91.6 | J/mol*K | PHPMS | Hiraoka, 1988 | gas phase; M |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
B - John E. Bartmess
MM - Michael M. Meot-Ner (Mautner)
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to O2+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 12.0697 ± 0.0002 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 421. | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 396.3 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
0.4480 ± 0.0060 | LPES | Ervin, Anusiewicz, et al., 2003 | B |
0.4510 ± 0.0070 | LPES | Travers, Cowles, et al., 1989 | B |
0.4400 ± 0.0080 | LPES | Celotta, Bennett, et al., 1972 | 89SAW puts DH(H-O2.) at 59 kcal/mol, implying ΔHacid=362.5; B |
0.451 ± 0.052 | ECD | Chen and Wentworth, 1983 | B |
0.44 ± 0.10 | CIDT | Tiernan and Wu, 1978 | From O2-; B |
0.40 ± 0.10 | NBIE | Durup, Parlant, et al., 1977 | B |
0.450 ± 0.024 | ETS | Burrow, 1974 | B |
0.50 ± 0.10 | NBIE | Baeda, 1972 | B |
0.430 ± 0.030 | LPES | Celotta, Bennett, et al., 1971 | B |
0.460 ± 0.050 | NBIE | Nalley and Compton, 1971 | B |
>0.45 ± 0.10 | Endo | Tiernan, Hughes, et al., 1971 | B |
0.50 ± 0.20 | NBIE | Lacmann and Herschbach, 1970 | B |
0.430 ± 0.020 | Kine | Pack and Phelps, 1966 | B |
>0.479998 | Endo | Berkowitz, Chupka, et al., 1971 | B |
>0.56 ± 0.10 | Endo | Chantry, 1971 | B |
0.725005 | ECD | Chen and Chen, 2003 | B |
>1.27 ± 0.20 | Endo | Bailey and Mahadevan, 1970 | B |
1.119 ± 0.069 | IMRB | Vogt, Hauffle, et al., 1970 | B |
>1.10 ± 0.10 | EIAE | Stockdale, Compton, et al., 1969 | From NO2; B |
0.150 ± 0.050 | PD | Burch, Smith, et al., 1958 | B |
Proton affinity at 298K
Proton affinity (kJ/mol) | Reference | Comment |
---|---|---|
421. ± 3. | Litorja and Ruscic, 1998 | T = 298K; MM |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
12.0697 ± 0.0002 | S | Tonkyn, Winniczek, et al., 1989 | LL |
12.1 ± 0.1 | EI | Grade, Wienecke, et al., 1983 | LBLHLM |
12.8 ± 0.5 | EI | Gomez, Chatillon, et al., 1982 | LBLHLM |
12.0 ± 1.0 | S | Farber, Srivastava, et al., 1982 | LBLHLM |
12.076 ± 0.002 | PE | MacNeil and Dixon, 1977 | LLK |
12.071 | PE | Kronebusch and Berkowitz, 1976 | LLK |
12.071 ± 0.001 | PE | Samson and Gardner, 1975 | LLK |
12.0 ± 0.5 | EI | Hildenbrand, 1975 | LLK |
12.2 ± 0.2 | EI | Bennett, Lin, et al., 1974 | LLK |
12.07 ± 0.01 | PI | Tanaka and Tanaka, 1973 | LLK |
12.08 | PE | Natalis, 1973 | LLK |
12.077 | PE | Dromey, Morrison, et al., 1973 | LLK |
12.127 | PE | Vilesov and Lopatin, 1972 | LLK |
12.072 ± 0.008 | PI | Dibeler and Walker, 1967 | RDSH |
12.059 ± 0.001 | S | Samson and Cairns, 1966 | RDSH |
12.078 ± 0.005 | PI | Brehm, 1966 | RDSH |
12.065 ± 0.003 | PI | Nicholson, 1963 | RDSH |
12.08 ± 0.01 | PI | Watanabe, 1957 | RDSH |
12.30 | PE | Kimura, Katsumata, et al., 1981 | Vertical value; LLK |
12.33 ± 0.01 | PE | Banna and Shirley, 1976 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
O+ | 18.734 | O | PIPECO | Blyth, Powis, et al., 1981 | LLK |
O+ | 17.28 | O- | PI | Oertel, Schenk, et al., 1980 | LLK |
O+ | 18.69 ± 0.04 | O | EI | Locht and Schopman, 1974 | LLK |
O+ | 17.3 ± 0.2 | O- | EI | Locht and Momigny, 1971 | LLK |
O+ | 17.25 ± 0.01 | O- | PI | Dibeler and Walker, 1967 | RDSH |
O+ | 17.272 ± 0.024 | O- | PI | Elder, Villarejo, et al., 1965 | RDSH |
O+ | 18.8 ± 0.4 | O | PI | Weissler, Samson, et al., 1959 | RDSH |
O+ | 18.99 ± 0.05 | O | EI | Frost and McDowell, 1959 | RDSH |
Anion protonation reactions
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1476.9 ± 3.0 | kJ/mol | D-EA | Travers, Cowles, et al., 1989 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1450.5 ± 3.4 | kJ/mol | H-TS | Travers, Cowles, et al., 1989 | gas phase; B |
Mass spectrum (electron ionization)
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, 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.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
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Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | D.HENNEBERG, MAX-PLANCK INSTITUTE, MULHEIM, WEST GERMANY |
NIST MS number | 61306 |
References
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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Baeda, 1972
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Celotta, Bennett, et al., 1971
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Grade, Wienecke, et al., 1983
Grade, M.; Wienecke, J.; Rosinger, W.; Hirschwald, W.,
Electron impact investigation of the molecules SeS(g) and TeSe(g) under high-temperature equilibrium conditions,
Ber. Bunsen-Ges. Phys. Chem., 1983, 87, 355. [all data]
Gomez, Chatillon, et al., 1982
Gomez, M.; Chatillon, C.; Allibert, M.,
Thermodynamics of gaseous and condensed indium oxides by mass spectrometry with controlled oxygen oressure,
J. Chem. Thermodyn., 1982, 14, 447. [all data]
Farber, Srivastava, et al., 1982
Farber, M.; Srivastava, R.D.; Moyer, J.W.,
Mass spectrometric determination of the thermodynamics of potassium hydroxide and minor potassium-containing species required in magnetohydrodynamic power systems,
J. Chem. Thermodyn., 1982, 14, 1103. [all data]
MacNeil and Dixon, 1977
MacNeil, K.A.G.; Dixon, R.N.,
High-resolution photoelectron spectroscopy of methanol and its deuterated derivatives: Internal rotation in the ground ionic state,
J. Electron Spectrosc. Relat. Phenom., 1977, 11, 315. [all data]
Kronebusch and Berkowitz, 1976
Kronebusch, P.L.; Berkowitz, J.,
Photodissociative ionization in the 21-41 eV region: O2, N2, CO, NO, CO2, H2O, NH3 and CH4,
Int. J. Mass Spectrom. Ion Phys., 1976, 22, 283. [all data]
Samson and Gardner, 1975
Samson, J.A.R.; Gardner, J.L.,
On the ionization potential of molecular oxygen,
Can. J. Phys., 1975, 53, 1948. [all data]
Hildenbrand, 1975
Hildenbrand, D.L.,
Vertical ionization potential of the CF2 radical,
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Bennett, Lin, et al., 1974
Bennett, S.L.; Lin, S.-S.; Gilles, P.W.,
High-temperature vaporization of ternary systems. I. Mass spectrometry of oxygen-rich vanadium-tungsten-oxygen species,
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Tanaka and Tanaka, 1973
Tanaka, K.; Tanaka, I.,
Photoelectron spectra from some autoionizing state of O2 near the ionization threshold,
J. Chem. Phys., 1973, 59, 5042. [all data]
Natalis, 1973
Natalis, P.,
Contribution a la spectroscopie photoelectronique. Effets de l'autoionisation dans less spectres photoelectroniques de molecules diatomiques et triatomiques,
Acad. R. Belg. Mem. Cl. Sci. Collect. 8, 1973, 41, 1. [all data]
Dromey, Morrison, et al., 1973
Dromey, R.G.; Morrison, J.D.; Peel, J.B.,
Time-averaged and deconvoluted photoelectron spectrum of the first band of O2,
Chem. Phys. Lett., 1973, 23, 30. [all data]
Vilesov and Lopatin, 1972
Vilesov, F.I.; Lopatin, S.N.,
Photoelectron spectrometer,
Zh. Tekh. Fiz., 1972, 42, 176. [all data]
Dibeler and Walker, 1967
Dibeler, V.H.; Walker, J.A.,
Mass spectrometric study of the photoionization of small polyatomic molecules,
Advan. Mass Spectrom., 1967, 4, 767. [all data]
Samson and Cairns, 1966
Samson, J.A.R.; Cairns, R.B.,
Ionization potential of O2,
J. Opt. Soc. Am., 1966, 56, 769. [all data]
Brehm, 1966
Brehm, B.,
Massenspektrometrische Untersuchung der Photoionisation von Molekulen,
Z. Naturforsch., 1966, 21a, 196. [all data]
Nicholson, 1963
Nicholson, A.J.C.,
Photo-ionization efficiency curves. Measurement of ionization potentials and interpretation of fine structure,
J. Chem. Phys., 1963, 39, 954. [all data]
Watanabe, 1957
Watanabe, K.,
Ionization potentials of some molecules,
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Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S.,
Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules
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Banna and Shirley, 1976
Banna, M.S.; Shirley, D.A.,
Molecular photoelectron spectroscopy at 132.3 eV: N2, CO, C2H4 and O2,
J. Electron Spectrosc. Relat. Phenom., 1976, 8, 255. [all data]
Blyth, Powis, et al., 1981
Blyth, R.C.G.; Powis, I.; Danby, C.J.,
Competing pre-dissociations of O2+(B 2Σg-),
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Oertel, Schenk, et al., 1980
Oertel, H.; Schenk, H.; Baumgartel, H.,
Ion pair formation from photon irradiation of O2, NO and CO in 17-30 eV,
Chem. Phys., 1980, 46, 251. [all data]
Locht and Schopman, 1974
Locht, R.; Schopman, J.,
The dissociative ionization in oxygen,
Int. J. Mass Spectrom. Ion Phys., 1974, 15, 361. [all data]
Locht and Momigny, 1971
Locht, R.; Momigny, J.,
Mass spectrometric study of ion-pair processes in diatomic molecules: H2, CO, NO and O2,
Int. J. Mass Spectrom. Ion Phys., 1971, 7, 121. [all data]
Elder, Villarejo, et al., 1965
Elder, F.A.; Villarejo, D.; Inghram, M.G.,
Electron affinity of oxygen,
J. Chem. Phys., 1965, 43, 758. [all data]
Weissler, Samson, et al., 1959
Weissler, G.L.; Samson, J.A.R.; Ogawa, M.; Cook, G.R.,
Photoionization analysis by mass spectroscopy,
J. Opt. Soc. Am., 1959, 49, 338. [all data]
Frost and McDowell, 1959
Frost, D.C.; McDowell, C.A.,
Recent electron impact studies on simple molecules (O2, Cl2, I2),
Advan. Mass Spectrom., 1959, 1, 413. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), References
- Symbols used in this document:
AE Appearance energy EA Electron affinity IE (evaluated) Recommended ionization energy S°gas,1 bar Entropy of gas at standard conditions (1 bar) T Temperature ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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