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
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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, 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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