Oxygen

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Reaction thermochemistry data

Go To: Top, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Constants of diatomic molecules, 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

Oxygen anion + Oxygen = (Oxygen anion • Oxygen)

By formula: O2- + O2 = (O2- • O2)

Quantity Value Units Method Reference Comment
Δr12. ± 4.kcal/molAVGN/AAverage of 5 out of 7 values; Individual data points
Quantity Value Units Method Reference Comment
Δr24.4cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr32.cal/mol*KPHPMSConway and Nesbit, 1968gas phase; M
Quantity Value Units Method Reference Comment
Δr3.2 ± 1.1kcal/molTDAsHiraoka, 1888gas phase; see also Sherwood, Hanold, et al., 1996. Aquino, Taylor, et al., 2001 calns indicate rectangular anion; B
Δr5.4 ± 1.0kcal/molIMREPayzant J.D. and Kebarle, 1972gas phase; B
Δr3.2 ± 1.0kcal/molIMREPack and Phelps, 1971gas phase; B
Δr4.00 ± 0.50kcal/molIMREParkes, 1971gas phase; B
Δr3.8 ± 1.0kcal/molTDAsConway and Nesbit, 1968gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
3.5300.DTPack and Phelps, 1971gas phase; M

Oxygen cation + Oxygen = (Oxygen cation • Oxygen)

By formula: O2+ + O2 = (O2+ • O2)

Quantity Value Units Method Reference Comment
Δr10. ± 1.kcal/molAVGN/AAverage of 5 out of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Δr18.8cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr25.02cal/mol*KPHPMSConway and Janik, 1970gas phase; M
Δr20.cal/mol*KPHPMSDurden, Kebarle, et al., 1969gas phase; M
Δr20.6cal/mol*KPHPMSYang and Conway, 1964gas phase; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
3.8300.DTRakshit and Warneck, 1981gas phase; M
3.3300.DTRakshit and Warneck, 1980gas phase; M
3.4296.FAHoward, Bierbaum, et al., 1972gas phase; M
5.9200.FAAdams and Bohme, 1970gas phase; M

(HO2+ • 2Oxygen) + Oxygen = (HO2+ • 3Oxygen)

By formula: (HO2+ • 2O2) + O2 = (HO2+ • 3O2)

Quantity Value Units Method Reference Comment
Δr2.7 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Δr3.2kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr18.3cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M
Δr20.cal/mol*KN/AHiraoka, Saluja, et al., 1979gas phase; Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
1.1105.PHPMSHiraoka, Saluja, et al., 1979gas phase; Entropy change calculated or estimated; M

(Oxygen anion • 7Nitrogen • Oxygen) + Nitrogen = (Oxygen anion • 8Nitrogen • Oxygen)

By formula: (O2- • 7N2 • O2) + N2 = (O2- • 8N2 • O2)

Quantity Value Units Method Reference Comment
Δr1.6 ± 0.3kcal/molPHPMSHiraoka, 1988, 2gas phase; M
Δr1.53kcal/molPHPMSHiraoka, 1988, 2gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr17.9cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M
Δr18.0cal/mol*KN/AHiraoka, 1988, 2gas phase; Entropy change calculated or estimated; M

O- + Oxygen = (O- • Oxygen)

By formula: O- + O2 = (O- • O2)

Quantity Value Units Method Reference Comment
Δr32.kcal/molPDissHiller and Vestal, 1981gas phase; From thermochemical cycle, ΔrH<; M
Δr39.0kcal/molPESNovich, Engelking, et al., 1979gas phase; From thermochemical cycle, from EA(O3), D(O-O2) AND EA(O); M
Δr38.kcal/molPDissCosby, Moseley, et al., 1978gas phase; M
Δr42.kcal/molCIDLifschitz, Wu, et al., 1978gas phase; M

(Oxygen cation • Oxygen) + Oxygen = (Oxygen cation • 2Oxygen)

By formula: (O2+ • O2) + O2 = (O2+ • 2O2)

Quantity Value Units Method Reference Comment
Δr5.9 ± 0.3kcal/molPHPMSHiraoka, 1988gas phase; M
Δr6.87 ± 0.06kcal/molPHPMSConway and Janik, 1970gas phase; M
Quantity Value Units Method Reference Comment
Δr26.3cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr31.78cal/mol*KPHPMSConway and Janik, 1970gas phase; M

(HO2+ • Oxygen) + Oxygen = (HO2+ • 2Oxygen)

By formula: (HO2+ • O2) + O2 = (HO2+ • 2O2)

Quantity Value Units Method Reference Comment
Δr6.9 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Δr6.6kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; M
Quantity Value Units Method Reference Comment
Δr23.1cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M
Δr22.cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; M

(Oxygen cation • 3Oxygen) + Oxygen = (Oxygen cation • 4Oxygen)

By formula: (O2+ • 3O2) + O2 = (O2+ • 4O2)

Quantity Value Units Method Reference Comment
Δr2.1 ± 0.2kcal/molPHPMSHiraoka, 1988gas phase; M
Δr2.46 ± 0.18kcal/molPHPMSConway and Janik, 1970gas phase; M
Quantity Value Units Method Reference Comment
Δr21.2cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr23.9cal/mol*KPHPMSConway and Janik, 1970gas phase; M

(Oxygen cation • 2Oxygen) + Oxygen = (Oxygen cation • 3Oxygen)

By formula: (O2+ • 2O2) + O2 = (O2+ • 3O2)

Quantity Value Units Method Reference Comment
Δr2.5 ± 0.2kcal/molPHPMSHiraoka, 1988gas phase; M
Δr2.5 ± 0.1kcal/molPHPMSConway and Janik, 1970gas phase; M
Quantity Value Units Method Reference Comment
Δr18.7cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr19.8cal/mol*KPHPMSConway and Janik, 1970gas phase; M

(Oxygen cation • 4Oxygen) + Oxygen = (Oxygen cation • 5Oxygen)

By formula: (O2+ • 4O2) + O2 = (O2+ • 5O2)

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.2kcal/molPHPMSHiraoka, 1988gas phase; M
Δr1.8 ± 0.7kcal/molPHPMSConway and Janik, 1970gas phase; M
Quantity Value Units Method Reference Comment
Δr21.4cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr17.0cal/mol*KPHPMSConway and Janik, 1970gas phase; M

O3- + Oxygen = (O3- • Oxygen)

By formula: O3- + O2 = (O3- • O2)

Quantity Value Units Method Reference Comment
Δr2.10 ± 0.20kcal/molTDAsHiraoka, 1988, 2gas phase; B,M
Quantity Value Units Method Reference Comment
Δr19.0cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr-3.60 ± 0.50kcal/molTDAsHiraoka, 1988, 2gas phase; B

Nitric oxide anion + Oxygen = (Nitric oxide anion • Oxygen)

By formula: NO- + O2 = (NO- • O2)

Quantity Value Units Method Reference Comment
Δr2.9 ± 0.2kcal/molPHPMSHiraoka and Yamabe, 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr14.5cal/mol*KPHPMSHiraoka and Yamabe, 1991gas phase; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
-0.4200.FADunkin, Fehsenfeld, et al., 1971gas phase; DG>; M

(Oxygen anion • 6Oxygen) + Oxygen = (Oxygen anion • 7Oxygen)

By formula: (O2- • 6O2) + O2 = (O2- • 7O2)

Quantity Value Units Method Reference Comment
Δr1.40kcal/molPHPMSHiraoka, 1988gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr16.cal/mol*KN/AHiraoka, 1988gas phase; Entropy change calculated or estimated; M

(Oxygen cation • 7Oxygen) + Oxygen = (Oxygen cation • 8Oxygen)

By formula: (O2+ • 7O2) + O2 = (O2+ • 8O2)

Quantity Value Units Method Reference Comment
Δr1.82kcal/molPHPMSHiraoka, 1988gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr22.cal/mol*KN/AHiraoka, 1988gas phase; Entropy change calculated or estimated; M

(Oxygen cation • Oxygen) + Nitrogen = (Oxygen cation • Nitrogen • Oxygen)

By formula: (O2+ • O2) + N2 = (O2+ • N2 • O2)

Quantity Value Units Method Reference Comment
Δr2.9kcal/molHPMSSpeller and Fitaire, 1983gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr10.1cal/mol*KHPMSSpeller and Fitaire, 1983gas phase; Entropy change is questionable; M

(H3+ • Oxygen) + Oxygen = (H3+ • 2Oxygen)

By formula: (H3+ • O2) + O2 = (H3+ • 2O2)

Quantity Value Units Method Reference Comment
Δr11.5kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; From thermochemical cycle(O2H+)O2; M
Quantity Value Units Method Reference Comment
Δr22.cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; From thermochemical cycle(O2H+)O2; M

(O3- • 4Oxygen) + Oxygen = (O3- • 5Oxygen)

By formula: (O3- • 4O2) + O2 = (O3- • 5O2)

Quantity Value Units Method Reference Comment
Δr1.54kcal/molPHPMSHiraoka, 1988, 2gas phase; ΔrH, ΔrS approximate; M
Quantity Value Units Method Reference Comment
Δr16.4cal/mol*KPHPMSHiraoka, 1988, 2gas phase; ΔrH, ΔrS approximate; M

H3+ + Oxygen = (H3+ • Oxygen)

By formula: H3+ + O2 = (H3+ • O2)

Quantity Value Units Method Reference Comment
Δr12.5kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; From thermochemical cycle(O2H+)O2; M
Quantity Value Units Method Reference Comment
Δr19.6cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; From thermochemical cycle(O2H+)O2; M

(O2S- • 2Sulfur dioxide • Oxygen) + Sulfur dioxide = (O2S- • 3Sulfur dioxide • Oxygen)

By formula: (O2S- • 2O2S • O2) + O2S = (O2S- • 3O2S • O2)

Quantity Value Units Method Reference Comment
Δr3.60 ± 0.40kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Δr1.5 ± 3.0kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- • Sulfur dioxide • Oxygen) + Sulfur dioxide = (O2S- • 2Sulfur dioxide • Oxygen)

By formula: (O2S- • O2S • O2) + O2S = (O2S- • 2O2S • O2)

Quantity Value Units Method Reference Comment
Δr4.60 ± 0.40kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Δr2.5 ± 2.0kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O3S- • Sulfur dioxide • Oxygen) + Sulfur dioxide = (O3S- • 2Sulfur dioxide • Oxygen)

By formula: (O3S- • O2S • O2) + O2S = (O3S- • 2O2S • O2)

Quantity Value Units Method Reference Comment
Δr5.70 ± 0.60kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Δr3.6 ± 2.1kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B

Oxygen cation + Oxygen = (Oxygen cation • Oxygen)

By formula: O+ + O2 = (O+ • O2)

Quantity Value Units Method Reference Comment
Δr42.9kcal/molPDissHiller and Vestal, 1982gas phase; M
Δr48.kcal/molPILinn, Ono, et al., 1981gas phase; M
Δr49.9kcal/molPDissMosely, Ozenne, et al., 1981gas phase; M

(O3S- • Oxygen) + Sulfur dioxide = (O3S- • Sulfur dioxide • Oxygen)

By formula: (O3S- • O2) + O2S = (O3S- • O2S • O2)

Quantity Value Units Method Reference Comment
Δr6.50 ± 0.80kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Δr4.4 ± 2.2kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B

(O2S- • Oxygen) + Sulfur dioxide = (O2S- • Sulfur dioxide • Oxygen)

By formula: (O2S- • O2) + O2S = (O2S- • O2S • O2)

Quantity Value Units Method Reference Comment
Δr11.0 ± 1.0kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Δr6.2 ± 2.2kcal/molTDAsVacher, Jorda, et al., 1992gas phase; B

(Oxygen anion • 2Nitrogen • Oxygen) + Nitrogen = (Oxygen anion • 3Nitrogen • Oxygen)

By formula: (O2- • 2N2 • O2) + N2 = (O2- • 3N2 • O2)

Quantity Value Units Method Reference Comment
Δr2.5 ± 0.2kcal/molPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr18.3cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M

(Oxygen anion • 3Nitrogen • Oxygen) + Nitrogen = (Oxygen anion • 4Nitrogen • Oxygen)

By formula: (O2- • 3N2 • O2) + N2 = (O2- • 4N2 • O2)

Quantity Value Units Method Reference Comment
Δr2.2 ± 0.2kcal/molPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr18.7cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M

(Oxygen anion • 4Nitrogen • Oxygen) + Nitrogen = (Oxygen anion • 5Nitrogen • Oxygen)

By formula: (O2- • 4N2 • O2) + N2 = (O2- • 5N2 • O2)

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.2kcal/molPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr19.5cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M

(Oxygen anion • 5Nitrogen • Oxygen) + Nitrogen = (Oxygen anion • 6Nitrogen • Oxygen)

By formula: (O2- • 5N2 • O2) + N2 = (O2- • 6N2 • O2)

Quantity Value Units Method Reference Comment
Δr1.8 ± 0.2kcal/molPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr19.5cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M

(Oxygen anion • 6Nitrogen • Oxygen) + Nitrogen = (Oxygen anion • 7Nitrogen • Oxygen)

By formula: (O2- • 6N2 • O2) + N2 = (O2- • 7N2 • O2)

Quantity Value Units Method Reference Comment
Δr1.7 ± 0.2kcal/molPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr18.8cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M

(Oxygen anion • Nitrogen • Oxygen) + Nitrogen = (Oxygen anion • 2Nitrogen • Oxygen)

By formula: (O2- • N2 • O2) + N2 = (O2- • 2N2 • O2)

Quantity Value Units Method Reference Comment
Δr2.8 ± 0.2kcal/molPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr17.9cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M

(Nitric oxide anion • 2Oxygen) + Oxygen = (Nitric oxide anion • 3Oxygen)

By formula: (NO- • 2O2) + O2 = (NO- • 3O2)

Quantity Value Units Method Reference Comment
Δr2.8 ± 0.2kcal/molPHPMSHiraoka and Yamabe, 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr15.7cal/mol*KPHPMSHiraoka and Yamabe, 1991gas phase; M

(Nitric oxide anion • 3Oxygen) + Oxygen = (Nitric oxide anion • 4Oxygen)

By formula: (NO- • 3O2) + O2 = (NO- • 4O2)

Quantity Value Units Method Reference Comment
Δr2.4 ± 0.2kcal/molPHPMSHiraoka and Yamabe, 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr16.1cal/mol*KPHPMSHiraoka and Yamabe, 1991gas phase; M

(Nitric oxide anion • 4Oxygen) + Oxygen = (Nitric oxide anion • 5Oxygen)

By formula: (NO- • 4O2) + O2 = (NO- • 5O2)

Quantity Value Units Method Reference Comment
Δr2.4 ± 0.2kcal/molPHPMSHiraoka and Yamabe, 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr19.2cal/mol*KPHPMSHiraoka and Yamabe, 1991gas phase; M

(Nitric oxide anion • Oxygen) + Oxygen = (Nitric oxide anion • 2Oxygen)

By formula: (NO- • O2) + O2 = (NO- • 2O2)

Quantity Value Units Method Reference Comment
Δr2.9 ± 0.2kcal/molPHPMSHiraoka and Yamabe, 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr15.7cal/mol*KPHPMSHiraoka and Yamabe, 1991gas phase; M

(HO2+ • 3Oxygen) + Oxygen = (HO2+ • 4Oxygen)

By formula: (HO2+ • 3O2) + O2 = (HO2+ • 4O2)

Quantity Value Units Method Reference Comment
Δr2.5 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr21.1cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(HO2+ • 4Oxygen) + Oxygen = (HO2+ • 5Oxygen)

By formula: (HO2+ • 4O2) + O2 = (HO2+ • 5O2)

Quantity Value Units Method Reference Comment
Δr2.2 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr21.9cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(HO2+ • 5Oxygen) + Oxygen = (HO2+ • 6Oxygen)

By formula: (HO2+ • 5O2) + O2 = (HO2+ • 6O2)

Quantity Value Units Method Reference Comment
Δr2.0 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr22.3cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(HO2+ • 6Oxygen) + Oxygen = (HO2+ • 7Oxygen)

By formula: (HO2+ • 6O2) + O2 = (HO2+ • 7O2)

Quantity Value Units Method Reference Comment
Δr2.0 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr22.5cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(HO2+ • 7Oxygen) + Oxygen = (HO2+ • 8Oxygen)

By formula: (HO2+ • 7O2) + O2 = (HO2+ • 8O2)

Quantity Value Units Method Reference Comment
Δr1.8 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr21.1cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(HO2+ • 8Oxygen) + Oxygen = (HO2+ • 9Oxygen)

By formula: (HO2+ • 8O2) + O2 = (HO2+ • 9O2)

Quantity Value Units Method Reference Comment
Δr1.7 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr20.6cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(HO2+ • Oxygen) + Hydrogen = (HO2+ • Hydrogen • Oxygen)

By formula: (HO2+ • O2) + H2 = (HO2+ • H2 • O2)

Quantity Value Units Method Reference Comment
Δr4.0kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; M
Quantity Value Units Method Reference Comment
Δr17.cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; M

(Oxygen anion • Oxygen) + Nitrogen = (Oxygen anion • Nitrogen • Oxygen)

By formula: (O2- • O2) + N2 = (O2- • N2 • O2)

Quantity Value Units Method Reference Comment
Δr2.9 ± 0.2kcal/molPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr16.5cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M

2Dimethyl sulfide + Oxygen = 2Dimethyl Sulfoxide

By formula: 2C2H6S + O2 = 2C2H6OS

Quantity Value Units Method Reference Comment
Δr-66.36 ± 0.20kcal/molCmDouglas, 1946liquid phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -66.5 ± 0.2 kcal/mol; At 291°K; ALS

Dimethyl sulfone = Dimethyl Sulfoxide + 0.5Oxygen

By formula: C2H6O2S = C2H6OS + 0.5O2

Quantity Value Units Method Reference Comment
Δr58.16 ± 0.20kcal/molCmDouglas, 1946liquid phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 59.0 ± 0.2 kcal/mol; At 291°K; ALS

(Oxygen anion • 2Oxygen) + Oxygen = (Oxygen anion • 3Oxygen)

By formula: (O2- • 2O2) + O2 = (O2- • 3O2)

Quantity Value Units Method Reference Comment
Δr2.4 ± 0.2kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr21.3cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen anion • 3Oxygen) + Oxygen = (Oxygen anion • 4Oxygen)

By formula: (O2- • 3O2) + O2 = (O2- • 4O2)

Quantity Value Units Method Reference Comment
Δr1.8 ± 0.3kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr15.4cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen anion • 4Oxygen) + Oxygen = (Oxygen anion • 5Oxygen)

By formula: (O2- • 4O2) + O2 = (O2- • 5O2)

Quantity Value Units Method Reference Comment
Δr1.5 ± 0.2kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr15.4cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen anion • 5Oxygen) + Oxygen = (Oxygen anion • 6Oxygen)

By formula: (O2- • 5O2) + O2 = (O2- • 6O2)

Quantity Value Units Method Reference Comment
Δr1.5 ± 0.3kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr16.2cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen cation • 5Oxygen) + Oxygen = (Oxygen cation • 6Oxygen)

By formula: (O2+ • 5O2) + O2 = (O2+ • 6O2)

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.3kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr21.7cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen cation • 6Oxygen) + Oxygen = (Oxygen cation • 7Oxygen)

By formula: (O2+ • 6O2) + O2 = (O2+ • 7O2)

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.4kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr21.9cal/mol*KPHPMSHiraoka, 1988gas phase; M

Henry's Law data

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, Constants of diatomic molecules, 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: Rolf Sander

Henry's Law constant (water solution)

kH(T) = H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(kH))/d(1/T) = Temperature dependence constant (K)

H (mol/(kg*bar)) d(ln(kH))/d(1/T) (K) Method Reference Comment
0.00131500.LN/A 
0.00131700.QN/AOnly the tabulated data between T = 273. K and T = 303. K from missing citation was used to derive kH and -Δ kH/R. Above T = 303. K the tabulated data could not be parameterized by equation (reference missing) very well. The partial pressure of water vapor (needed to convert some Henry's law constants) was calculated using the formula given by missing citation. The quantities A and α from missing citation were assumed to be identical.
0.0013 N/AN/A 
0.00121700.XN/A 
0.00131500.LN/A 
0.00121800.MN/A 
0.00131700.XN/AThe value is taken from the compilation of solubilities by W. Asman (unpublished).

Gas phase ion energetics data

Go To: Top, Reaction thermochemistry data, Henry's Law data, Ion clustering data, Constants of diatomic molecules, 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 ± 0.0002eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)101.kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity94.72kcal/molN/AHunter and Lias, 1998HL

Electron affinity determinations

EA (eV) Method Reference Comment
0.4480 ± 0.0060LPESErvin, Anusiewicz, et al., 2003B
0.4510 ± 0.0070LPESTravers, Cowles, et al., 1989B
0.4400 ± 0.0080LPESCelotta, Bennett, et al., 197289SAW puts DH(H-O2.) at 59 kcal/mol, implying ΔHacid=362.5; B
0.451 ± 0.052ECDChen and Wentworth, 1983B
0.44 ± 0.10CIDTTiernan and Wu, 1978From O2-; B
0.40 ± 0.10NBIEDurup, Parlant, et al., 1977B
0.450 ± 0.024ETSBurrow, 1974B
0.50 ± 0.10NBIEBaeda, 1972B
0.430 ± 0.030LPESCelotta, Bennett, et al., 1971B
0.460 ± 0.050NBIENalley and Compton, 1971B
>0.45 ± 0.10EndoTiernan, Hughes, et al., 1971B
0.50 ± 0.20NBIELacmann and Herschbach, 1970B
0.430 ± 0.020KinePack and Phelps, 1966B
>0.479998EndoBerkowitz, Chupka, et al., 1971B
>0.56 ± 0.10EndoChantry, 1971B
0.725005ECDChen and Chen, 2003B
>1.27 ± 0.20EndoBailey and Mahadevan, 1970B
1.119 ± 0.069IMRBVogt, Hauffle, et al., 1970B
>1.10 ± 0.10EIAEStockdale, Compton, et al., 1969From NO2; B
0.150 ± 0.050PDBurch, Smith, et al., 1958B

Proton affinity at 298K

Proton affinity (kcal/mol) Reference Comment
100.6 ± 0.8Litorja and Ruscic, 1998T = 298K; MM

Ionization energy determinations

IE (eV) Method Reference Comment
12.0697 ± 0.0002STonkyn, Winniczek, et al., 1989LL
12.1 ± 0.1EIGrade, Wienecke, et al., 1983LBLHLM
12.8 ± 0.5EIGomez, Chatillon, et al., 1982LBLHLM
12.0 ± 1.0SFarber, Srivastava, et al., 1982LBLHLM
12.076 ± 0.002PEMacNeil and Dixon, 1977LLK
12.071PEKronebusch and Berkowitz, 1976LLK
12.071 ± 0.001PESamson and Gardner, 1975LLK
12.0 ± 0.5EIHildenbrand, 1975LLK
12.2 ± 0.2EIBennett, Lin, et al., 1974LLK
12.07 ± 0.01PITanaka and Tanaka, 1973LLK
12.08PENatalis, 1973LLK
12.077PEDromey, Morrison, et al., 1973LLK
12.127PEVilesov and Lopatin, 1972LLK
12.072 ± 0.008PIDibeler and Walker, 1967RDSH
12.059 ± 0.001SSamson and Cairns, 1966RDSH
12.078 ± 0.005PIBrehm, 1966RDSH
12.065 ± 0.003PINicholson, 1963RDSH
12.08 ± 0.01PIWatanabe, 1957RDSH
12.30PEKimura, Katsumata, et al., 1981Vertical value; LLK
12.33 ± 0.01PEBanna and Shirley, 1976Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
O+18.734OPIPECOBlyth, Powis, et al., 1981LLK
O+17.28O-PIOertel, Schenk, et al., 1980LLK
O+18.69 ± 0.04OEILocht and Schopman, 1974LLK
O+17.3 ± 0.2O-EILocht and Momigny, 1971LLK
O+17.25 ± 0.01O-PIDibeler and Walker, 1967RDSH
O+17.272 ± 0.024O-PIElder, Villarejo, et al., 1965RDSH
O+18.8 ± 0.4OPIWeissler, Samson, et al., 1959RDSH
O+18.99 ± 0.05OEIFrost and McDowell, 1959RDSH

Anion protonation reactions

Oxygen anion + Hydrogen cation = Hydroperoxy radical

By formula: O2- + H+ = HO2

Quantity Value Units Method Reference Comment
Δr352.99 ± 0.72kcal/molD-EATravers, Cowles, et al., 1989gas phase; B
Quantity Value Units Method Reference Comment
Δr346.67 ± 0.82kcal/molH-TSTravers, Cowles, et al., 1989gas phase; B

Ion clustering data

Go To: Top, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Constants of diatomic molecules, 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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

Calcium ion (1+) + Oxygen = (Calcium ion (1+) • Oxygen)

By formula: Ca+ + O2 = (Ca+ • O2)

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
6.0296.FASpears and Fehsenfeld, 1972gas phase; M

HO2+ + Oxygen = (HO2+ • Oxygen)

By formula: HO2+ + O2 = (HO2+ • O2)

Quantity Value Units Method Reference Comment
Δr20.0kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; M
Quantity Value Units Method Reference Comment
Δr27.cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; M

(HO2+ • Oxygen) + Oxygen = (HO2+ • 2Oxygen)

By formula: (HO2+ • O2) + O2 = (HO2+ • 2O2)

Quantity Value Units Method Reference Comment
Δr6.9 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Δr6.6kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; M
Quantity Value Units Method Reference Comment
Δr23.1cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M
Δr22.cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; M

(HO2+ • 2Oxygen) + Oxygen = (HO2+ • 3Oxygen)

By formula: (HO2+ • 2O2) + O2 = (HO2+ • 3O2)

Quantity Value Units Method Reference Comment
Δr2.7 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Δr3.2kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr18.3cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M
Δr20.cal/mol*KN/AHiraoka, Saluja, et al., 1979gas phase; Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
1.1105.PHPMSHiraoka, Saluja, et al., 1979gas phase; Entropy change calculated or estimated; M

(HO2+ • 3Oxygen) + Oxygen = (HO2+ • 4Oxygen)

By formula: (HO2+ • 3O2) + O2 = (HO2+ • 4O2)

Quantity Value Units Method Reference Comment
Δr2.5 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr21.1cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(HO2+ • 4Oxygen) + Oxygen = (HO2+ • 5Oxygen)

By formula: (HO2+ • 4O2) + O2 = (HO2+ • 5O2)

Quantity Value Units Method Reference Comment
Δr2.2 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr21.9cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(HO2+ • 5Oxygen) + Oxygen = (HO2+ • 6Oxygen)

By formula: (HO2+ • 5O2) + O2 = (HO2+ • 6O2)

Quantity Value Units Method Reference Comment
Δr2.0 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr22.3cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(HO2+ • 6Oxygen) + Oxygen = (HO2+ • 7Oxygen)

By formula: (HO2+ • 6O2) + O2 = (HO2+ • 7O2)

Quantity Value Units Method Reference Comment
Δr2.0 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr22.5cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(HO2+ • 7Oxygen) + Oxygen = (HO2+ • 8Oxygen)

By formula: (HO2+ • 7O2) + O2 = (HO2+ • 8O2)

Quantity Value Units Method Reference Comment
Δr1.8 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr21.1cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(HO2+ • 8Oxygen) + Oxygen = (HO2+ • 9Oxygen)

By formula: (HO2+ • 8O2) + O2 = (HO2+ • 9O2)

Quantity Value Units Method Reference Comment
Δr1.7 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr20.6cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

H3+ + Oxygen = (H3+ • Oxygen)

By formula: H3+ + O2 = (H3+ • O2)

Quantity Value Units Method Reference Comment
Δr12.5kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; From thermochemical cycle(O2H+)O2; M
Quantity Value Units Method Reference Comment
Δr19.6cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; From thermochemical cycle(O2H+)O2; M

(H3+ • Oxygen) + Oxygen = (H3+ • 2Oxygen)

By formula: (H3+ • O2) + O2 = (H3+ • 2O2)

Quantity Value Units Method Reference Comment
Δr11.5kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; From thermochemical cycle(O2H+)O2; M
Quantity Value Units Method Reference Comment
Δr22.cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; From thermochemical cycle(O2H+)O2; M

Lithium ion (1+) + Oxygen = (Lithium ion (1+) • Oxygen)

By formula: Li+ + O2 = (Li+ • O2)

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
4.2319.DTColonna-Romano and Keller, 1976gas phase; low E/N; M

Nitric oxide anion + Oxygen = (Nitric oxide anion • Oxygen)

By formula: NO- + O2 = (NO- • O2)

Quantity Value Units Method Reference Comment
Δr2.9 ± 0.2kcal/molPHPMSHiraoka and Yamabe, 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr14.5cal/mol*KPHPMSHiraoka and Yamabe, 1991gas phase; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
-0.4200.FADunkin, Fehsenfeld, et al., 1971gas phase; DG>; M

(Nitric oxide anion • Oxygen) + Oxygen = (Nitric oxide anion • 2Oxygen)

By formula: (NO- • O2) + O2 = (NO- • 2O2)

Quantity Value Units Method Reference Comment
Δr2.9 ± 0.2kcal/molPHPMSHiraoka and Yamabe, 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr15.7cal/mol*KPHPMSHiraoka and Yamabe, 1991gas phase; M

(Nitric oxide anion • 2Oxygen) + Oxygen = (Nitric oxide anion • 3Oxygen)

By formula: (NO- • 2O2) + O2 = (NO- • 3O2)

Quantity Value Units Method Reference Comment
Δr2.8 ± 0.2kcal/molPHPMSHiraoka and Yamabe, 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr15.7cal/mol*KPHPMSHiraoka and Yamabe, 1991gas phase; M

(Nitric oxide anion • 3Oxygen) + Oxygen = (Nitric oxide anion • 4Oxygen)

By formula: (NO- • 3O2) + O2 = (NO- • 4O2)

Quantity Value Units Method Reference Comment
Δr2.4 ± 0.2kcal/molPHPMSHiraoka and Yamabe, 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr16.1cal/mol*KPHPMSHiraoka and Yamabe, 1991gas phase; M

(Nitric oxide anion • 4Oxygen) + Oxygen = (Nitric oxide anion • 5Oxygen)

By formula: (NO- • 4O2) + O2 = (NO- • 5O2)

Quantity Value Units Method Reference Comment
Δr2.4 ± 0.2kcal/molPHPMSHiraoka and Yamabe, 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr19.2cal/mol*KPHPMSHiraoka and Yamabe, 1991gas phase; M

Sodium ion (1+) + Oxygen = (Sodium ion (1+) • Oxygen)

By formula: Na+ + O2 = (Na+ • O2)

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
0.2310.DTKeller and Beyer, 1971gas phase; low E/N; M

Oxygen cation + Oxygen = (Oxygen cation • Oxygen)

By formula: O+ + O2 = (O+ • O2)

Quantity Value Units Method Reference Comment
Δr42.9kcal/molPDissHiller and Vestal, 1982gas phase; M
Δr48.kcal/molPILinn, Ono, et al., 1981gas phase; M
Δr49.9kcal/molPDissMosely, Ozenne, et al., 1981gas phase; M

(Oxygen cation • Oxygen) + Oxygen = (Oxygen cation • 2Oxygen)

By formula: (O+ • O2) + O2 = (O+ • 2O2)

Quantity Value Units Method Reference Comment
Δr6.9kcal/molPILinn, Ono, et al., 1981gas phase; M

(Oxygen cation • 2Oxygen) + Oxygen = (Oxygen cation • 3Oxygen)

By formula: (O+ • 2O2) + O2 = (O+ • 3O2)

Quantity Value Units Method Reference Comment
Δr0.9kcal/molPILinn, Ono, et al., 1981gas phase; M

O- + Oxygen = (O- • Oxygen)

By formula: O- + O2 = (O- • O2)

Quantity Value Units Method Reference Comment
Δr32.kcal/molPDissHiller and Vestal, 1981gas phase; From thermochemical cycle, ΔrH<; M
Δr39.0kcal/molPESNovich, Engelking, et al., 1979gas phase; From thermochemical cycle, from EA(O3), D(O-O2) AND EA(O); M
Δr38.kcal/molPDissCosby, Moseley, et al., 1978gas phase; M
Δr42.kcal/molCIDLifschitz, Wu, et al., 1978gas phase; M

Oxygen cation + Oxygen = (Oxygen cation • Oxygen)

By formula: O2+ + O2 = (O2+ • O2)

Quantity Value Units Method Reference Comment
Δr10. ± 1.kcal/molAVGN/AAverage of 5 out of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Δr18.8cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr25.02cal/mol*KPHPMSConway and Janik, 1970gas phase; M
Δr20.cal/mol*KPHPMSDurden, Kebarle, et al., 1969gas phase; M
Δr20.6cal/mol*KPHPMSYang and Conway, 1964gas phase; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
3.8300.DTRakshit and Warneck, 1981gas phase; M
3.3300.DTRakshit and Warneck, 1980gas phase; M
3.4296.FAHoward, Bierbaum, et al., 1972gas phase; M
5.9200.FAAdams and Bohme, 1970gas phase; M

(Oxygen cation • Oxygen) + Oxygen = (Oxygen cation • 2Oxygen)

By formula: (O2+ • O2) + O2 = (O2+ • 2O2)

Quantity Value Units Method Reference Comment
Δr5.9 ± 0.3kcal/molPHPMSHiraoka, 1988gas phase; M
Δr6.87 ± 0.06kcal/molPHPMSConway and Janik, 1970gas phase; M
Quantity Value Units Method Reference Comment
Δr26.3cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr31.78cal/mol*KPHPMSConway and Janik, 1970gas phase; M

(Oxygen cation • 2Oxygen) + Oxygen = (Oxygen cation • 3Oxygen)

By formula: (O2+ • 2O2) + O2 = (O2+ • 3O2)

Quantity Value Units Method Reference Comment
Δr2.5 ± 0.2kcal/molPHPMSHiraoka, 1988gas phase; M
Δr2.5 ± 0.1kcal/molPHPMSConway and Janik, 1970gas phase; M
Quantity Value Units Method Reference Comment
Δr18.7cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr19.8cal/mol*KPHPMSConway and Janik, 1970gas phase; M

(Oxygen cation • 3Oxygen) + Oxygen = (Oxygen cation • 4Oxygen)

By formula: (O2+ • 3O2) + O2 = (O2+ • 4O2)

Quantity Value Units Method Reference Comment
Δr2.1 ± 0.2kcal/molPHPMSHiraoka, 1988gas phase; M
Δr2.46 ± 0.18kcal/molPHPMSConway and Janik, 1970gas phase; M
Quantity Value Units Method Reference Comment
Δr21.2cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr23.9cal/mol*KPHPMSConway and Janik, 1970gas phase; M

(Oxygen cation • 4Oxygen) + Oxygen = (Oxygen cation • 5Oxygen)

By formula: (O2+ • 4O2) + O2 = (O2+ • 5O2)

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.2kcal/molPHPMSHiraoka, 1988gas phase; M
Δr1.8 ± 0.7kcal/molPHPMSConway and Janik, 1970gas phase; M
Quantity Value Units Method Reference Comment
Δr21.4cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr17.0cal/mol*KPHPMSConway and Janik, 1970gas phase; M

(Oxygen cation • 5Oxygen) + Oxygen = (Oxygen cation • 6Oxygen)

By formula: (O2+ • 5O2) + O2 = (O2+ • 6O2)

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.3kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr21.7cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen cation • 6Oxygen) + Oxygen = (Oxygen cation • 7Oxygen)

By formula: (O2+ • 6O2) + O2 = (O2+ • 7O2)

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.4kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr21.9cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen cation • 7Oxygen) + Oxygen = (Oxygen cation • 8Oxygen)

By formula: (O2+ • 7O2) + O2 = (O2+ • 8O2)

Quantity Value Units Method Reference Comment
Δr1.82kcal/molPHPMSHiraoka, 1988gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr22.cal/mol*KN/AHiraoka, 1988gas phase; Entropy change calculated or estimated; M

Oxygen anion + Oxygen = (Oxygen anion • Oxygen)

By formula: O2- + O2 = (O2- • O2)

Quantity Value Units Method Reference Comment
Δr12. ± 4.kcal/molAVGN/AAverage of 5 out of 7 values; Individual data points
Quantity Value Units Method Reference Comment
Δr24.4cal/mol*KPHPMSHiraoka, 1988gas phase; M
Δr32.cal/mol*KPHPMSConway and Nesbit, 1968gas phase; M
Quantity Value Units Method Reference Comment
Δr3.2 ± 1.1kcal/molTDAsHiraoka, 1888gas phase; see also Sherwood, Hanold, et al., 1996. Aquino, Taylor, et al., 2001 calns indicate rectangular anion; B
Δr5.4 ± 1.0kcal/molIMREPayzant J.D. and Kebarle, 1972gas phase; B
Δr3.2 ± 1.0kcal/molIMREPack and Phelps, 1971gas phase; B
Δr4.00 ± 0.50kcal/molIMREParkes, 1971gas phase; B
Δr3.8 ± 1.0kcal/molTDAsConway and Nesbit, 1968gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
3.5300.DTPack and Phelps, 1971gas phase; M

(Oxygen anion • Oxygen) + Oxygen = (Oxygen anion • 2Oxygen)

By formula: (O2- • O2) + O2 = (O2- • 2O2)

Quantity Value Units Method Reference Comment
Δr2.5 ± 0.2kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr20.9cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen anion • 2Oxygen) + Oxygen = (Oxygen anion • 3Oxygen)

By formula: (O2- • 2O2) + O2 = (O2- • 3O2)

Quantity Value Units Method Reference Comment
Δr2.4 ± 0.2kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr21.3cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen anion • 3Oxygen) + Oxygen = (Oxygen anion • 4Oxygen)

By formula: (O2- • 3O2) + O2 = (O2- • 4O2)

Quantity Value Units Method Reference Comment
Δr1.8 ± 0.3kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr15.4cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen anion • 4Oxygen) + Oxygen = (Oxygen anion • 5Oxygen)

By formula: (O2- • 4O2) + O2 = (O2- • 5O2)

Quantity Value Units Method Reference Comment
Δr1.5 ± 0.2kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr15.4cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen anion • 5Oxygen) + Oxygen = (Oxygen anion • 6Oxygen)

By formula: (O2- • 5O2) + O2 = (O2- • 6O2)

Quantity Value Units Method Reference Comment
Δr1.5 ± 0.3kcal/molPHPMSHiraoka, 1988gas phase; M
Quantity Value Units Method Reference Comment
Δr16.2cal/mol*KPHPMSHiraoka, 1988gas phase; M

(Oxygen anion • 6Oxygen) + Oxygen = (Oxygen anion • 7Oxygen)

By formula: (O2- • 6O2) + O2 = (O2- • 7O2)

Quantity Value Units Method Reference Comment
Δr1.40kcal/molPHPMSHiraoka, 1988gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr16.cal/mol*KN/AHiraoka, 1988gas phase; Entropy change calculated or estimated; M

O3- + Oxygen = (O3- • Oxygen)

By formula: O3- + O2 = (O3- • O2)

Quantity Value Units Method Reference Comment
Δr2.10 ± 0.20kcal/molTDAsHiraoka, 1988, 2gas phase; B,M
Quantity Value Units Method Reference Comment
Δr19.0cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr-3.60 ± 0.50kcal/molTDAsHiraoka, 1988, 2gas phase; B

(O3- • Oxygen) + Oxygen = (O3- • 2Oxygen)

By formula: (O3- • O2) + O2 = (O3- • 2O2)

Quantity Value Units Method Reference Comment
Δr2.0 ± 0.2kcal/molPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr19.4cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M

(O3- • 2Oxygen) + Oxygen = (O3- • 3Oxygen)

By formula: (O3- • 2O2) + O2 = (O3- • 3O2)

Quantity Value Units Method Reference Comment
Δr2.0 ± 0.3kcal/molPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr20.0cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M

(O3- • 3Oxygen) + Oxygen = (O3- • 4Oxygen)

By formula: (O3- • 3O2) + O2 = (O3- • 4O2)

Quantity Value Units Method Reference Comment
Δr1.6 ± 0.3kcal/molPHPMSHiraoka, 1988, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr15.4cal/mol*KPHPMSHiraoka, 1988, 2gas phase; M

(O3- • 4Oxygen) + Oxygen = (O3- • 5Oxygen)

By formula: (O3- • 4O2) + O2 = (O3- • 5O2)

Quantity Value Units Method Reference Comment
Δr1.54kcal/molPHPMSHiraoka, 1988, 2gas phase; ΔrH, ΔrS approximate; M
Quantity Value Units Method Reference Comment
Δr16.4cal/mol*KPHPMSHiraoka, 1988, 2gas phase; ΔrH, ΔrS approximate; M

O4- + Nitrogen + Oxygen = N2O4-

By formula: O4- + N2 + O2 = N2O4-

Quantity Value Units Method Reference Comment
Δr2.90 ± 0.20kcal/molTDAsHiraoka, 1988, 2gas phase; B
Quantity Value Units Method Reference Comment
Δr-2.10 ± 0.50kcal/molTDAsHiraoka, 1988, 2gas phase; B

Constants of diatomic molecules

Go To: Top, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering 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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through March, 1977

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for 16O2
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
A detailed review of the entire spectrum of molecular oxygen has been published by Krupenie, 1972. Potential energy diagrams Gilmore, 1965, Freund, 1971, Krupenie, 1972, Albritton, Schmeltekopf, et al., 1979; predicted electronic states and potential functions Buenker and Peyerimhoff, 1975, Moss and Goddard, 1975, Beebe, Thulstrup, et al., 1976.
Several Rydberg states converging to the oxygen K limits at 543.1(4Σ-) and 544.2(2Σ-) eV, in X-ray absorption and electron energy loss spectrum.
Nakamura, Morioka, et al., 1971; Wight and Brion, 1974; LaVilla, 1975
Z (3Πu) 2           Z ← X 532 eV 1
Nakamura, Morioka, et al., 1971; Wight and Brion, 1974; LaVilla, 1975
Absorption cross sections and cross sections fot the production of atomic fluorescence by photodissociation in the region 175 - 850 Angstrom (570000 - 115000 cm-1) Lee, Carlson, et al., 1973, Watson, Lang, et al., 1973, Carlson, 1974, Lee, Carlson, et al., 1974. Earlier results in Weissler and Lee, 1952, Aboud, Curtis, et al., 1955, De Reilhac and Damany-Astoin, 1964.
RydbergRydberg states with the outer electrons in 3sσ, 3pσ, 3dσ orbitals and the O2+ core in the highest ...1πu3g2 2Πu state have been tentatively identified in the electroionizaton spectrum O2 at 20.73, 21.75, 22.28 eV, respectively.
Codling and Madden's Rydberg series converging to c 4Σu+(v=0) of O2+:
ν = 198125 - R/(n-0.16)2 n=3(Y state), 4...11 3, 4 Similar series with v'=1.
Codling and Madden, 1965
ν = 198125 - R/(n-0.95)2 n=3(W state), 4...8 3, 4, 5 Similar series with v'=1.
Codling and Madden, 1965
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
Y (184440) 3 [1510]   4      Y ← X 184410
missing citation
W (3Σu-) (168290) 3 [1510]   4      W ← X 168260
missing citation
VYoshino and Tanaka's weak Rydberg series converging to B 2Σg-(v=0) of O2+:
ν = 163700 - R/(n-0.54)2 n=6(V state), 7...12.3 Similar series with v'=1,2,3.
Yoshino and Tanaka, 1968
(160270) 3 (1100)         V ← X 160031
Yoshino and Tanaka, 1968
RydbergTanaka and Takamine's strong Rydberg s. of R shaded dif. b. converging to B 2Σg-(v=0) of O2+:
ν = 163702 - R/(n-0.70)2 n=3(U state),4...23.3,6 Similar series with v'=1,2,3.
Tanaka and Takamine, 1941; Ogawa, 1968; Yoshino and Tanaka, 1968
Fragments of Rydberg series (155000 - 160000 cm-1) converging to D 2Δg of O2+.
Lindholm, 1968
Namioka, Ogawa and Tanaka's Rydberg s. of weak R shaded b. converging to b 4Σg-(v=0) of O2+:
ν = 1465607 - R/(n-0.53)2 n=4(R state),5...16.3 Similar series with v'=1,2.
Namioka, Ogawa, et al., 1962; Yoshino and Tanaka, 1968
Tanaka and Takamine's Rydberg s. of strong R shaded b. converging to b 4Σg-(v=0) of O2+:
ν = 1465567 - R/(n-0.68)2 n=4(Q state),5...30.3,8 Similar series with v'=1...4.
Tanaka and Takamine, 1941; Namioka, Ogawa, et al., 1962; Yoshino and Tanaka, 1968
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
U 142548 3 1148 H 23  6      U ← X R 142329 H
Tanaka and Takamine, 1941; Ogawa, 1968
R (137643) 3 (1152) H         R ← X R 137432 H
Yoshino and Tanaka, 1968
Q 136759 3 1207 H 18  6      Q ← X R 136571 H
Price and Collins, 1935; Namioka, Ogawa, et al., 1962; Yoshino and Tanaka, 1968
Additional unclassified bands in the region 100000 - 135000 cm-1 Tanaka and Takamine, 1941. Absorption and photoionization cross sections of O2 (X 3Σg-) 100000 - 170000 cm-1 Watanabe, 1958, Huffman, Larrabee, et al., 1964, Cook and Metzger, 1964, Matsunaga and Watanabe, 1967. Dissociation continua with maxima at 125000, 131000, 138000 cm-1 Cook, Ogawa, et al., 1973.
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
p 1Φu 118951 1071 9 H 8.3  1.116 10 0.014  4.5E-6  1.374 p ← a R 110815 H
missing citation; missing citation; missing citation
I" (118200) (1050) 11 (15)  12      I" ← X (117900)
Tanaka and Takamine, 1941; Dehmer and Chupka, 1975
I' 117750 1050 13 9.9  12 14      I' ← X 117490
missing citation; missing citation; missing citation
116420 1070 13 14.5  12 14      I ← X 116160
missing citation; missing citation; missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
H (3Πu) 99880 [1070] 15   12      H ← X 99630
missing citation; missing citation; missing citation; missing citation
Additional discrete and diffuse absorption bands in the region 80000 - 100000 cm-1 (only partly assigned) may belong to various Rydberg series converging to the first ionziation potential. Onset of the ionzation continuum observed at 1027.6 Angstrom (97314 cm-1) by photoionization mass spectrometry Dehmer and Chupka, 1975. Absorption cross sections of O2 (X 3Σg-) 51000 - 100000 cm-1 Watanabe, 1958, Kosinskaya and Startsev, 1965, Ogawa and Ogawa, 1975. Absorption cross sections of O2 (X 1Δg) have been measured Ogawa and Ogawa, 1975 from 63000 to 92000 cm-1 (see also Ogawa, 1970), photoionization cross sections Clark and Wayne, 1970, from 89400 to 96600 cm-1.
missing citation; Tanaka, 1952; Yamawaki and Ogawa, 1972; Chang and Ogawa, 1973; Ogawa, Yamawaki, et al., 1975
4f complex [91300] 16          4f ← a 82500
Collins, Husain, et al., 1973
           4f ← X 90500
Chang and Ogawa, 1973
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
L (3Πu) [90044] 17    [1.588] 17   [29E-6] 17  [1.152] 17 L ← X V 89257.3 Z
Chang and Ogawa, 1973
[89948] 17    [1.531] 17   [20E-6] 17  [1.173] 17 L ← X V 89161.0 17 Z
Chang and Ogawa, 1973
[89858]    [1.486] 17   [30E-6] 17  [1.191] 17 L ← X V 89070.7 Z
Chang and Ogawa, 1973
k (1Δu) [89066]    [1.451]   [20.8E-6]  [1.205] k ← a V 80395.8 Z
Alberti, Ashby, et al., 1968; Yamawaki and Ogawa, 1972
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
j (1Σu+) (87209) 18 [1896]   [1.701] 19  [12E-6] 19  [1.113] j ← X V 87370.2 Z
missing citation; Chang and Ogawa, 1973
G (3Σu+) (86998) [1822] 20  [1.698] 0.026 20    [1.114] G ← X V 87122 21 Z
Chang and Ogawa, 1973; missing citation
A Rydberg series (observed in absorption from a 1Δg) joins on to e, e' and i, i' and converges to X 2Πg of O2+.
Chang and Ogawa, 1972; Collins, Husain, et al., 1973
i (1Δ2u) (86846) [2062]   [1.688] 0.042  [10.5E-6]  [1.117] i ← a V 79208.0 22 Z
Alberti, Ashby, et al., 1968; Yamawaki and Ogawa, 1972; Collins, Husain, et al., 1973
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
i' (3Δ2u) (86843) [1699]   [1.791]   [140E-6]  [1.085] i' ← a V 79022.6 22 Z
Alberti, Ashby, et al., 1968; Yamawaki and Ogawa, 1972; Collins, Husain, et al., 1973
h (1Πu) (86750) (2200)   [1.451] 23     [1.205] 23 h ← a V 81362.5 23 Z
Alberti, Ashby, et al., 1968; Yamawaki and Ogawa, 1972
g (1Πu) (86604) [2048]   [1.615] 24   [6.0E-6] 24  [1.142] g ← X V 86841.4 Z
Chang and Ogawa, 1973
F' [87510] 25          F' ← X 86720
Tanaka, 1952; missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
F 3Πu (85868) [2008] H 26   [1.434]   [11E-6]  [1.212] F ← X 86085.0 Z
Chang and Ogawa, 1972; Chang and Ogawa, 1973; missing citation
(85780) [2000] H 26   [1.398]   [6.0E-6]  [1.228] F ← X 85992.6 27 Z
Chang and Ogawa, 1972; Chang and Ogawa, 1973; missing citation
(85689) [2001] H 26   [1.352]   [5.3E-6]  [1.249] F ← X 85902.3 Z
Chang and Ogawa, 1972; Chang and Ogawa, 1973; missing citation
E 3Σu- (79883) [2547] 28  28      E ← X R 80369 28
missing citation; Tanaka, 1952; Cartwright, Hunt, et al., 1973; missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
f 1Σu+ 76091 29 1927 19.0  1.703 30 0.020  31  1.113 f ← b V 63141.5 Z
Alberti, Ashby, et al., 1968
           f ← X V 76262.4 32
Alberti, Ashby, et al., 1968; missing citation; missing citation
D (3Σu+) (75260) 33 1957 19.7  1.73 34 0.025  35  1.104 D ← X V (75450)
Alberti, Ashby, et al., 1968; missing citation; missing citation
e (1Δ2u) (75254) [1830] H   [1.682] 36     [1.119] e ← a V 67499.6 37 Z
Alberti, Ashby, et al., 1968; Ogawa, 1970; Yamawaki and Ogawa, 1972; Collins, Husain, et al., 1973
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
e' (3Δ2u) (74915) [2052] H 38        e' ← a V 67272 37 H
Alberti, Ashby, et al., 1968; Ogawa, 1970; Yamawaki and Ogawa, 1972; Collins, Husain, et al., 1973
d (1Πg) (69180) [1860] 39        (d ← X) 69320 40
Trajmar, Cartwright, et al., 1976
C (3Πg) (65530) [1840] 41        (C ← X) 65670 40
Cartwright, Hunt, et al., 1973; Huebner, Celotta, et al., 1975
B 3Σu- 49793.28 709.31 42 Z 10.65 42 -0.139 0.81902 42 43 44 0.01206 42 -5.56E-4 4.55E-6 45  1.60426 B ↔ X 46 47 R 49358.15 Z
missing citation; missing citation; missing citation; missing citation; missing citation; Ackerman and Biaume, 1970; Creek and Nicholls, 1975
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
A 3Σu+ 35397.8 799.07 Z 12.16 48 -0.550 0.9106 0.01416 48 -9.7E-4 4.7E-6 49  1.5215 (A → b) 50 (21886)
           (A → a) 50 (27125
           A ↔ X 51 52 R 35007.15 Z
missing citation; missing citation; missing citation
A' 3Δu (34690) 53 (850) 54 (20) 54  (0.96) 55 (0.0262) 55    (1.48) (A' → a) 50 (26440)
           A' ← X 56 57 R (34320) 54
missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
c 1Σu- 33057.3 794.29 Z 12.736 58 -.2444 0.9155 0.01391 58 -7.40E-4 [7.4E-6]  1.5174 c → a 59 (24782)
Richards and Johnson, 1976
           c ↔ X 60 R 32664.1 Z
missing citation; Degen, 1968
b 1Σg+ 13195.1 1432.77 61Z 14.00 61  1.40037 61 0.01820 61  5.351E-6 62  1.22688 b → a 63 5238.5
Noxon, 1961
           b ↔ → X 64 65 R 13120.91 66 Z
missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
a 1Δg 7918.1 [1483.50] Z (12.9)  1.4264 0.0171  [4.86E-6]  1.21563 a ↔ X 67 68 65 R 7882.39 Z
missing citation
X 3Σg- 0 1580.193 Z 11.981 69 .04747 [1.4376766] 70 0.01593 71 72  [4.839E-6] 70 72  1.20752 73  
Crawford, Welsh, et al., 1949; Shapiro and Gush, 1966; McKellar, Rich, et al., 1972
Rotation sp. 74 75
McKnight and Gordy, 1968; Gebbie, Burroughs, et al., 1969
Spin reorientation (fine structure) sp. 74 76
Miller and Townes, 1953; Zimmerer and Mizushima, 1961; West and Mizushima, 1966; Wilheit and Barrett, 1970; Amano and Hirota, 1974
Raman sp. 77
missing citation; missing citation; Fletcher and Rayside, 1974; missing citation
EPR sp.
Tinkham and Strandberg, 1955; Gerber, 1972; Cook, Zegarski, et al., 1973

Notes

1 Wight and Brion, 1974 obtain 530.8 eV from the electron energy loss spectrum.
2Strong X-ray absorption peak (excitation 1s0 → 1πg).
3Possible upper state symmetries have been discussed on theoretical Leclercq, 1967 and empirical Lindholm, 1968 grounds. Several of these Rydberg levels have also been observed in the high resolution electron energy loss spectrum Geiger and Schroder, 1968.
4Strongly preionized.
5A weak satellite series approximately 50 cm-1 longward of the main bands has been observed by Codling and Madden, 1965.
6Preionization observed by photoionization mass-spectrometry Dehmer and Chupka, 1975.
7The limits refer to band origins; the approximate head-origin separation has been subtracted from the observed heads.
8Both preionization (to O2+ + e-) and predissociation (to O+ + O- for n≥5) have been established by photoionization mass- spectrometry Dehmer and Chupka, 1975.
9The 0-0, 1-0, 2-0 bands are overlapped. Vibrational numbering confirmed by 18O2 isotope shifts.
10Rotational analyses for v=3,5,7; v=4,6,8,9 are diffuse.
11Probably progression II of Tanaka and Takamine, 1941, extended and reassigned by Katayama, Huffman, Tanaka [unpublished, see Figure 1 of Dehmer and Chupka, 1975].
12Preionization observed by photoionization mass-spectrometry Dehmer and Chupka, 1975. Several autoionizing levels have been studied by photoelectron spectroscopy Bahr, Blake, et al., 1971, Kinsinger and Taylor, 1973, Tanaka and Tanaka, 1973. See also Nicholson, 1963.
13These progressions have been reassigned and extended by Katayana, Huffman, Tanaka (see 11) and include most of the bands of progressions I, N, I', P of Price and Collins, 1935. They occur in the region of the second member (4sσg) of the Rydberg series beginning with H [ Lindholm, 1968, see 15). Other Rydberg series going to a 4Πu or A 2Πu may also be present; higher members possibly account for many unassigned bands in the region 810-740 Å (123000 - 135000 cm-1).
14That the diffuse nature of the bands is at least partly due to predissociation has been shown by the observation of 0-I lines in fluorescence; Carlson, 1974 gives cross sections for this reaction from 850 to 650 Å (117000 - 154000 cm-1).
15Long but strongly perturbed v' progression composed of bands previously Price and Collins, 1935 assigned to four shorter progressions H, H', M, M'; first member (3sσg) of a Rydberg series converging to a 4Πu of O2+ Lindholm, 1968, Edqvist, Lindholm, et al., 1970). The intensity distribution [ Huffman, Larrabee, et al., 1964, Matsunaga and Watanabe, 1967, see also Dehmer and Chupka, 1975] closely resembles that of the a 4Πu progression in the photoelectron spectrum Edqvist, Lindholm, et al., 1970.
16Very complex spectrum 90400 - 90700 cm-1.
17Vibrational numbering uncertain.
18 Ogawa and Yamawaki, 1969 assumed this to be a 3Σu+ state; reassigned by Chang and Ogawa, 1973.
19B1 = 1.698, D1 = 42E-6.
20Partial rotational analyses of a weak and diffuse 0-0 band and of stronger 1-0 and 2-0 bands Chang and Ogawa, 1973.
21The 1802 isotope effect shows that this is a 0-0 band Ogawa, Yamawaki, et al., 1975.
22The two components are assumed to correspond to the ground state splitting (A = 200) of O2+ Yamawaki and Ogawa, 1972, Collins, Husain, et al., 1973.
23Perturbed rotational structure. According to Yamawaki and Ogawa, 1972 these constants refer to the 1-0 band, the unresolved 0-0 band being at 79180 cm-1.
24Constants for Π+; B0-) = 1.611, D0-) = 14E-6. Constants for the diffuse v=1 level were also determined.
25Group of six line-like features similar to F ← X.
26v=1 diffuse
27The 18O2 isotope shift shows that this is a 0-0 band. F 3Πu is a mixed state resulting from the avoided crossing of the unstable 3Πu state (arising from 3P + 3P) with the lowest 3Πu Rydberg state (3pσu); see Buenker and Peyerimhoff, 1975, Buenker, Peyerimhoff, et al., 1976. Oscillator strengths Huebner, Celotta, et al., 1975.
28The three strongest bands in this region at 80369, 82916, 85345 cm-1 [called "longest band", "second band", "third band" by Tanaka, 1952] have long resisted attempts at identification. Recent ab initio calculations Yoshimine, Tanaka, et al., 1976, Buenker, Peyerimhoff, et al., 1976 have shown that very probably they correspond to the second 3Σu- state formed by the avoided crossing of B 3Σu- with the lowest 3Σu- Rydberg state (3pπu). The predicted ωe is of the order of 3000 cm-1. All three bands are diffuse [O(1D) atoms have been detected in the predissociation of E 3Σu- Stone, Lawrence, et al., 1976] and show double peaks (two close double peaks for the "second band"). In 1802 the rotational structure of the "longest band" is resolved [B'= 1.3072 Ogawa, 1975, D'= 1.8E-6 Ogawa, 1975, λ'= 3.37 Ogawa, 1975, γ'= +0.045 Ogawa, 1975] and confirms that the upper state is indeed 3Σu- Ogawa, Yamawaki, et al., 1975. On the basis of the observed isotope shift Ogawa, Yamawaki, et al., 1975 prefer the assignment of the "longest band" as 1-0b. [see also Buenker, Peyerimhoff, et al., 1976]. f values of 0.0102, 0.0080, 0.0015, for three bands have been determined from electron energy loss measurements Huebner, Celotta, et al., 1975.
29α state of Alberti, Ashby, et al., 1968, progression II of Tanaka, 1952.
30v=2 diffuse. Rotational constants for 18O2 in Ogawa, 1975.
31D2= 25.8E-6, D3= 7E-6, D4= 10E-6.
32The 0-0 band is not observed since it is in the continuum which covers the 1300 Å region.
33β state of Alberti, Ashby, et al., 1968 who assumed it to be 1Σu+; reassigned by Ogawa and Yamawaki, 1969. Progression I of Tanaka, 1952.
34Levels other than v=2 and 3 are too diffuse for analysis, both in 16O2 and 18O2; for the latter see Ogawa, 1975.
35D2 = 14.8E-6; D3 = 21.0E-6.
36(diffuse lines)
37See 22.
38ΔG(3/2) = 1698, ΔG(5/2) = 1838.
39ΔG(3/2) = 1770, ΔG(5/2) ~1800.
40From electron energy loss spectra. C and d are considered to be the lowest Rydberg states (3sσg) of O2. Apparent oscillator strengths, summed over the first four bands of the C-X progression, yield an f value of f= 0.00074 Huebner, Celotta, et al., 1975.
41ΔG(3/2) = 1960 Cartwright, Hunt, et al., 1973, Huebner, Celotta, et al., 1975, ΔG(5/2) = 1780 Cartwright, Hunt, et al., 1973, Huebner, Celotta, et al., 1975 [average of values given by Cartwright, Hunt, et al., 1973 and Huebner, Celotta, et al., 1975].
42ωeye = -0.139, γe = -0.000556 from a low order fit to v ≤ 4; the representation of levels having v ≤ 13 requires seven Yi0 and seven Yi1 coefficients Krupenie, 1972, Albritton, Schmeltekopf, et al., 1979; T0 values of Ackerman and Biaume, 1970 (absorption) and Creek and Nicholls, 1975 (emission) agree to better than 0.1 cm-1 [note, however, two typographical errors for G0 and G3 in Table 5 of Creek and Nicholls, 1975]. Convergence limit of the vibrational levels at 57127.5~ cm-1 Brix and Herzberg, 1954. RKR potential Krupenie, 1972, Vanderslice, Mason, et al., 1960, Ginter and Battino, 1965.
43The spin splitting constants at low v are λ = 1.5, -γ ~ 0.04 cm-1. They increase rapidly above v~12 Brix and Herzberg, 1954, Bergeman and Wofsy, 1972.
44Predissociation above v=2 established by line width measurements in absorption Wilkinson and Mulliken, 1957, Carroll, 1959, Hudson and Carter, 1968, Ackerman and Biaume, 1970, Snopko, 1970, Hudson and Mahle, 1972; maximum at v=4, subsidiary peaks at v=7,11. Ab initio calculations Schaefer and Miller, 1971, Julienne and Krauss, 1975, Julienne, 1976 show that the repulsive 5Πu state from normal atoms is the main contributor to the predissociation with smaller contributions from 1Πu, 3Πu [earlier investigators assumed this to be the only contributor Riess and Ben-Aryeh, 1969, Murrell and Taylor, 1969, Child, 1970, Durmaz and Murrell, 1971] and 3Σu+. Evidence for inverse predissociation has been foumd by Myers and Bartle, 1968; see also Wray and Fried, 1971, Sharma and Wray, 1971.
45β =0.22E-6 for low v; Dv increases rapidly above v~4.
46The B state levels have been observed in absorption from v'=0 to the convergence limit (see 42) Brix and Herzberg, 1954, Ackerman and Biaume, 1970. Absorption by vibrationally excited O2(v" ≤ 5) Ogawa, 1966, Ogawa and Chang, 1968; data for 17O16O, 18O16O, 18O2 Halmann, 1964, Halmann and Laulicht, 1965; absorption in inert gas matrices Bass and Broida, 1964, Schnepp and Dressler, 1965, Boursey, Roncin, et al., 1970 and Fugol, Gimpelevich, et al., 1976. The formation of O(1D) atoms by photoabsorption in the adjoining continuum has been verified by Stone, Lawrence, et al., 1976. Emission bands with low v' and high v" are observed in various electrical discharges Feast, 1950, Herman, Herman, et al., 1961, Creek and Nicholls, 1975.
47For intensity measurements in the discrete portion of the B-X system see Bethke, 1959, Blake, Carver, et al., 1966, Farmer, Fabian, et al., 1968, Hudson and Carter, 1968, Ackerman, Biaume, et al., 1970, Hasson, Hebert, et al., 1970, Huebner, Celotta, et al., 1975, and in the continuum Kosinskaya and Startsev, 1965, Blake, Carver, et al., 1966, Goldstein and Mastrup, 1966, Huebner, Celotta, et al., 1975; at the absorption maximum near 1445 Å (69200 cm-1) the absorption coefficient is 382 cm-1 (σ = 1.42E-17 cm2) Goldstein and Mastrup, 1966. Absorption f values vary from 3.4E-10 for the 0-0 band to 3.4E-5 for the 14-0, 15-0 bands to 1.3E-5 for the 20-0 band, yielding an oscillator strength sum of ~32E-5 for the Schumann-Runge bands. The overall electronic absorption oscillator strength is 0.162 which represents an upper limit if, as suggested by Huebner, Celotta, et al., 1975 and recently confirmed by Cartwright, Fiamengo, et al., 1976, the continuum contains contributions from other dissociative states; see also Julienne, Neumann, et al., 1976. A rather different total f value of 0.040 is derived from shock-tube absorption and emission studies Treanor and Wurster, 1960, Krindach, Sobolev, et al., 1963, Buttrey, 1969; the discrepancy is probably due to the r-dependence of the electronic transition moment Marr, 1964, Halmann and Laulicht, 1967, Allison, Dalgarno, et al., 1971, Julienne, Neumann, et al., 1976. Franck-Condon factors based on RKR and similar potentials Jarmain, 1963, Halmann and Laulicht, 1967, Harris, Blackledge, et al., 1969, Krupenie, 1972, Albritton, Schmeltekopf, et al., 1979; Halmann and Laulicht, 1967 give data for 18O2. The spectral emissivity in the Schumann-Runge bands has been discussed by Ben-Aryeh, 1968, Buttrey, 1969. Franck-Condon densities Jarmain and Nicholls, 1964.
48The constants of Herzberg, 1952 have been adjusted Jarmain and Nicholls, 1967, Krupenie, 1972 to the revised vibrational numbering (v' raised by one unit) of Broida and Gaydon, 1954. The spin- splitting constants for low v are λ= -4.95 and γ ~0; they decrease appreciably above v~7. RKR potential Vanderslice, Mason, et al., 1960, Degen, Innanen, et al., 1968, Jarmain, 1972, Krupenie, 1972.
49Dv increases rapidly above v~4.
50The tentative identification of the A → b transition in an oxygen afterglow by Broida and Gaydon, 1954 was not confirmed by Barth and Kaplan, 1957. Other unidentified features in the nightglow and in the oxygen afterglow have been variously attributed to the A → a and A' → a transitions by Wraight, 1976 and Chamberlain, 1958, respectively. A high resolution trace of one of these bands at 4007 Å can be seen in Figure 1 of Degen, 1968.
51First observed in absorption at atmospheric pressure and a path of >25 m Herzberg, 1932, Herzberg, 1952. The bands occur in emission in the nightglow Chamberlain, 1955, Chamberlain, 1958 and in various afterglows Broida and Gaydon, 1954, Barth and Kaplan, 1957, Barth and Patapoff, 1962, Degen and Nicholls, 1968. According to Broida and Peyron, 1960, Bass and Broida, 1964 bands correlated with this system have also been observed in matrix isolation studies; these bands have recently been reassigned, see 57.
52For detailed intensity measurements in the discrete region and in the adjoining continuum see Ditchburn and Young, 1962, Blake, Carver, et al., 1966, Degen and Nicholls, 1969, Ogawa, 1971, Hasson and Nicholls, 1971. The electronic absorption oscillator strength is cross sections ~E-7; Cross sections in the continuum vary from ~0.5E-24 cm2 at 2400 Å to ~30E-24 cm2 at 1920 Å where transitions to other dissociative states begin to make significant contributions to the observed intensity Hasson and Nicholls, 1971. Franck-Condon factors and Franck-Condon densities Jarmain and Nicholls, 1967, Degen, Innanen, et al., 1968, Jarmain, 1972, Krupenie, 1972.
53The separation of the F3 and F2 components in v=6, extrapolated to J=0, is 145.9 cm-1.
54The vibrational constants and v00 have been estimated from measurements of the diffuse high-pressure bands (see 56). The only accurately known vibrational interval is ΔG(11/2) = 611.2 for the F3 component Herzberg, 1953. The vibrational numbering is uncertain.
55Extrapolated from B5 and B6 assuming a linear Bv curve; the v numbering has been estimated (see 54).
56Only two weak bands have been analyzed at low pressure and 800 m path length Herzberg, 1953. At high pressure and in liquid O2 a fairly strong progression of diffuse triplets has been studied by many investigators. This progression appears to be the analogue in (O2)2 of the A' ← X bands (their intensity increases with the square of the pressure) Wulf, 1928, Finkelnburg and Steiner, 1932, Herman, 1939, Herzberg, 1953. For lack of other information the A' ← X 0-0 band is assumed to be at the position of the first diffuse high-pressure band.
57Visible emission bands of oxygen in low temperature matrices Broida and Peyron, 1960 have recently been reinterpreted Richards and Johnson, 1976 as belonging to the A' → X system.
58ωeze ~ +0.00055. The constants refer to the revised vibrational numbering suggested by Degen, 1968; see 60.
59This system was only observed in Xe matrices (v00 = 24552) by excitation with VUV light.
60In absorption the 6-0,... ,11-0 bands [new v' numbering of Degen, 1968, 1-0,... ,6-0 in the old numbering of Herzberg, 1953] have been observed with path lengths of 800 m atm Herzberg, 1953; in emission several bands with low v' are seen in the afterglow of an oxygen-argon mixture Degen and Nicholls, 1966, Degen, 1968. The v'=0 progression is the strongest feature of the Venus night airglow Lawrence, Barth, et al., 1977.
61These constants have been re-evaluated [ Albritton, Harrop, et al., 1973, see also Creek and Nicholls, 1975] from the measurements of the b-X system Babcock and Herzberg, 1948 using improved lower state constants; γe = -0.000042. RKR potential curve Albritton, Harrop, et al., 1973. Constants for 16O18O, 16O17O in Babcock and Herzberg, 1948.
62Dv= +0.0318(v+1/2) + 0.00l2(v+1/2)2 Albritton, Harrop, et al., 1973. The Dv values have been calculated Albritton, Harrop, et al., 1973 using vibrational wavefunctions computed from the experimental potential curve; see Albritton, Harrop, et al., 1973, 2.
63Q branch of the 0-0 band observed in a discharge through O2 and He. Absolute transition probability ~2.5E-3s-1.
64In absorption observed in the solar spectrum; in the laboratory with more than 1m path. In emission in the aurora and nightglow Meinel, 1950 as well as in various discharges Kaplan, 1947, Kvifte, 1951, Herman, Herman, et al., 1961, Noxon, 1961. Band intensities [in cm-1 km-1 atm-1 (STP)] for the 0-0, 1-0, 2-0 bands are 532, 40.8, 1.52, respectively Miller, Boese, et al., 1969; slightly smaller values in Galkin, Zhukova, et al., 1972. The transition probability for the 0-0 band is 0.075 s-1 [average of values given by Miller, Boese, et al., 1969 and Galkin, Zhukova, et al., 1972]. Dianov-Klokov, 1964 gives the band oscillator strengths f00 = 2.5E-10 Dianov-Klokov, 1964, f10 ~0.2E-10 Dianov-Klokov, 1964. RKR Franck- Condon factors Krupenie, 1972, Albritton, Schmeltekopf, et al., 1979; rotational intensity distribution and pressure broadening Burch and Gryvnak, 1969, Miller, Boese, et al., 1969, Galkin, Zhukova, et al., 1972.
65Pressure induced spectra a ← X, b ← X as well as simultaneous transitions in two colliding molecules have been studied by many investigators. See recent papers by Findlay, 1970, McKellar, Rich, et al., 1972 which refer to earlier work.
66 Albritton, Harrop, et al., 1973 give v00 = 13122.235 cm-1 Albritton, Harrop, et al., 1973, differing by +2/3 λ (spin-spin interaction in X 3Σg-) from the zero line of Babcock and Herzberg, 1948.
67EPR spectra of O2(1Δg) Falick, Mahan, et al., 1965, Miller, 1971; for 17O16O see Arrington, Falick, et al., 1971.
68Observed in absorption in the solar spectrum Herzberg and Herzberg, 1947, in emission in a discharge Noxon, 1961 and in the day and twilight glow Jones and Harrison, 1958, Noxon and Jones, 1962, Gattinger, 1968. Values given for the transition probability A00(s-1) are 2.58E-4 Badger, Wright, et al., 1965, 1.9E-4 Jones and Harrison, 1958, 1.5E-4 Jones and Gattinger, 1963. Franck-Condon factors Nicholls, Fraser, et al., 1960, Krupenie, 1972, Albritton, Schmeltekopf, et al., 1979; Haslett and Fehsenfeld, 1969.
69ωeze = -0.001273 Krupenie, 1972, Albritton, Schmeltekopf, et al., 1979, see also Curry and Herzberg, 1934. ΔG(1/2) = 1556.381 Babcock and Herzberg, 1948, Albritton, Harrop, et al., 1973, Fletcher and Rayside, 1974, higher ΔG values are less accurately known. G(v) values for v ≤ 28 are listed in Creek and Nicholls, 1975. RKR potential curve Vanderslice, Mason, et al., 1960, 2, Krupenie, 1972, Albritton, Schmeltekopf, et al., 1979.
70From a re-evaluation by Johns and Lepard, 1975 of all available microwave and photographic (electronic and Raman) data; these constants supersede earlier results of Welch and Mizushima, 1972 and are in very good agreement with Steinbach and Gordy, 1975, Tomuta, Mizushima, et al., 1975. Spin splitting constants λ0 = +1.9847511, γ0 = -0.00842536; higher order (centrifugal distortion) constants in Johns and Lepard, 1975, Steinbach and Gordy, 1975, Tomuta, Mizushima, et al., 1975, see also Veseth and Lofthus, 1974. For v=1, λ1 = +1.989586 Amano and Hirota, 1974, γ1 = -0.0084468 Amano and Hirota, 1974, see also Cook, Zegarski, et al., 1973.
71αv= +0.0000641(v+1/2)2 - 2.85E-6(v+1/2)3 Krupenie, 1972, Albritton, Schmeltekopf, et al., 1979. B1 = 1.42192 Albritton, Harrop, et al., 1973, Amano and Hirota, 1974, Creek and Nicholls, 1975; see also Babcock and Herzberg, 1948.
72Bv and Dv values for v ≤ 28 are listed in Creek and Nicholls, 1975.
73Rot.-Vibr. sp. (collision induced)
74For microwave data on 18O2 see Steinbach and Gordy, 1973, on 16O18O Amano and Hirota, 1974, Steinbach and Gordy, 1975.
75Laser magnetic resonance spectra Mizushima, Wells, et al., 1972, Evenson and Mizushima, 1972, Tomuta, Mizushima, et al., 1975.
76The Stark effect of the 118 GHz fine structure transition (N=1,J=1←J=0) has been observed by Gustafson and Gordy, 1974 leading to a reliable value for the polarizability anisotropy α(parallel) - α(perp) = 1.12 Å3 Gustafson and Gordy, 1974.
77For Raman data on 16O18O and 18O2 see Edwards, Good, et al., 1976, Harney and Milanovich, 1976. The 2-1 hot band was recently resolved in the purely isotropic part of the scattered light Altmann, Klockner, et al., 1977. Spin structure Rich and Lepard, 1971.
7841260 ± 15 cm-1, from the convergence limit of the B ← X bands Brix and Herzberg, 1954.
79From the high resolution photoelectron spectrum of Samson and Gardner, 1975, see also Al-Joboury, May, et al., 1965, Turner and May, 1966, Turner, 1968. Photoionization studies [ McNeal and Cook, 1966, Samson and Cairns, 1966, additional references in Samson and Gardner, 1975] give appearance potentials of ~12.067 eV.
80Calculated from the energy levels of O2+
81From the X-ray photoelectron spectrum Siegbahn, Nordling, et al., 1969.

References

Go To: Top, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Constants of diatomic molecules, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Hiraoka, 1988
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Hiraoka, 1888
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Payzant J.D. and Kebarle, 1972
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Adams and Bohme, 1970
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Notes

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