Oxygen monofluoride

• Formula: FO
• Molecular weight: 34.9978
• IUPAC Standard InChI: InChI=1S/FO/c1-2 Copy

  
• IUPAC Standard InChIKey: FXOFAYKVTOLJTJ-UHFFFAOYSA-N Copy
• CAS Registry Number: 12061-70-0
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Information on this page:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Constants of diatomic molecules
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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Gas phase thermochemistry data

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

Gas Phase Heat Capacity (Shomate Equation)

C_p° = 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
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Gas phase ion energetics data

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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:
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
B - John E. Bartmess

View reactions leading to FO⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

References

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Notes

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

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Gilles, Polak, et al., 1992
Gilles, M.K.; Polak, M.L.; Lineberger, W.C., Photoelectron Spectroscopy of the Halogen Oxide Anions FO-, ClO-, BrO-, IO-, OClO-, and OIO-, J. Chem. Phys., 1992, 96, 11, 8012, https://doi.org/10.1063/1.462352 . [all data]

Alekseev, Volkov, et al., 1984
Alekseev, V.I.; Volkov, V.M.; Fedorova, L.I.; Baluev, A.V., Mass Spectrometric Study of the Ionization of an Oxygen Difluoride Molecule, Izv. Akad. Nauk SSR Ser. Khim. 1302, 1984. [all data]

Thynne and MacNeil, 1970
Thynne, J.C.J.; MacNeil, K.A.G., Ionisation and dissociation of carbonyl fluoride and trifluoromethyl hypofluorite by electron impact, Intern. J. Mass Spectrom. Ion Phys., 1970, 5, 95. [all data]

Zhang, Kuo, et al., 1994
Zhang, Z.; Kuo, S.-C.; Klemm, R.B.; Monks, P.S.; Stief, L.J., A discharge flow-photoionization mass spectrometric study of the FO (X 2i) radical. Photoionization efficiency spectrum and ionization energy, Chem. Phys. Lett., 1994, 229, 377. [all data]

Dyke, Jonathan, et al., 1980
Dyke, J.M.; Jonathan, N.; Mills, J.D.; Morris, A., Vacuum ultraviolet photoelectron spectroscopy of transient species Part 12. TheFO(X²π₁) radical, Mol. Phys., 1980, 40, 1177. [all data]

Berkowitz, Dehmer, et al., 1973
Berkowitz, J.; Dehmer, P.M.; Chupka, W.A., Photoionization mass spectrometry of F₂O, J. Chem. Phys., 1973, 59, 925. [all data]

Notes

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• Symbols used in this document:
  

  EA	Electron affinity
  IE (evaluated)	Recommended ionization energy
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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