Hypoiodous acid

• Formula: HIO
• Molecular weight: 143.9118
• IUPAC Standard InChI: InChI=1S/HIO/c1-2/h2H Copy

  
• IUPAC Standard InChIKey: GEOVEUCEIQCBKH-UHFFFAOYSA-N Copy
• CAS Registry Number: 14332-21-9
• Chemical structure:
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• Information on this page:
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Vibrational and/or electronic energy levels
  • References
  • Notes
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Reaction 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.

Data compiled by: John E. Bartmess

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.

Individual Reactions

IO^- +  =

By formula: IO^- + H⁺ = HIO

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 compiled as indicated in comments:
B - John E. Bartmess
LL - Sharon G. Lias and Joel F. Liebman

Ionization energy determinations

De-protonation reactions

IO^- +  =

By formula: IO^- + H⁺ = HIO

Vibrational and/or electronic energy levels

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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 compiled by: Marilyn E. Jacox

State:   ?

State:   ?

State:   X

Additional references: Jacox, 1994, page 52; Jacox, 1998, page 156; Jacox, 2003, page 46; Bauer, Ingham, et al., 1998; Ozeki and Saito, 2004

Notes

References

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, NIST Free Links, Notes

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

Gilles, Polak, et al., 1991
Gilles, M.K.; Polak, M.L.; Lineberger, W.C., Photoelectron Spectroscopy of IO-, J. Chem. Phys., 1991, 95, 6, 4723, https://doi.org/10.1063/1.461746 . [all data]

Monks, Stief, et al., 1995
Monks, P.S.; Stief, L.J.; Tardy, D.C.; Liebman, J.F.; Zhang, Z.; Kuo, S.-C.; Klemm, R.B., Discharge flow-photoionization mass spectrometric study of HOI: Photoionization efficiency spectrum and ionization energy, J. Phys. Chem., 1995, 99, 16566. [all data]

Walker, Tevault, et al., 1978
Walker, N.; Tevault, D.E.; Smardzewski, R.R., Matrix reactions of ozone and oxygen atoms with hydrogen iodide. HOI formation, J. Chem. Phys., 1978, 69, 2, 564, https://doi.org/10.1063/1.436647 . [all data]

Barnes, Becker, et al., 1992
Barnes, I.; Becker, K.H.; Starcke, J., FTIR spectroscopic observation of gaseous HOI, Chem. Phys. Lett., 1992, 196, 6, 578, https://doi.org/10.1016/0009-2614(92)85997-O . [all data]

Klaassen, Lindner, et al., 1996
Klaassen, J.J.; Lindner, J.; Leone, S.R., Observation of the ν1 OH(OD) stretch of HOI and DOI by Fourier transform infrared emission spectroscopy, J. Chem. phys., 1996, 104, 19, 7403, https://doi.org/10.1063/1.471456 . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Jacox, 1998
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement A, J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017 . [all data]

Jacox, 2003
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement B, J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629 . [all data]

Bauer, Ingham, et al., 1998
Bauer, D.; Ingham, T.; Carl, S.A.; Moortgat, G.K.; Crowley, J.N., Ultraviolet-Visible Absorption Cross Sections of Gaseous HOI and Its Photolysis at 355 nm, J. Phys. Chem. A, 1998, 102, 17, 2857, https://doi.org/10.1021/jp9804300 . [all data]

Ozeki and Saito, 2004
Ozeki, H.; Saito, S., Submillimeter-wave spectra of hypoiodous acid, J. Chem. Phys., 2004, 120, 11, 5110, https://doi.org/10.1063/1.1647053 . [all data]

Notes

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• Symbols used in this document:
  

  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

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