Hydrogen azide

• Formula: HN₃
• Molecular weight: 43.0280
• IUPAC Standard InChI: InChI=1S/HN3/c1-3-2/h1H Copy

  
• IUPAC Standard InChIKey: JUINSXZKUKVTMD-UHFFFAOYSA-N Copy
• CAS Registry Number: 7782-79-8
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Other names: Hydrazoic acid; Azoimide; Diazoimide; Hydronitric acid; Triazoic acid; HN3; Stickstoffwasserstoffsaeure
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• Information on this page:
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • Mass spectrum (electron ionization)
  • Vibrational and/or electronic energy levels
  • Gas Chromatography
  • 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 as indicated in comments:
B - John E. Bartmess
MS - José A. Martinho Simões

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

 +  =

By formula: N₃^- + H⁺ = HN₃

C₁₀H₁₀N₆Ti (cr) + 2( • 4.18) (solution) =  (cr) + 2 (g)

By formula: C₁₀H₁₀N₆Ti (cr) + 2(HCl • 4.18H₂O) (solution) = C₁₀H₁₀Cl₂Ti (cr) + 2HN₃ (g)

Henry's Law 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: Rolf Sander

Henry's Law constant (water solution)

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

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:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

Appearance energy determinations

De-protonation reactions

 +  =

By formula: N₃^- + H⁺ = HN₃

Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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: Takehiko Shimanouchi

Symmetry:   C_s     Symmetry Number σ = 1

Source: Shimanouchi, 1972

Notes

Gas Chromatography

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Van Den Dool and Kratz RI, polar column, temperature ramp

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References

Go To: Top, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, Gas Chromatography, NIST Free Links, Notes

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

Yang, Kiran, et al., 2004
Yang, X.; Kiran, B.; Wang, X.B.; Wang, L.S.; Mucha, M.; Jungwirth, P., Solvation of the azide anion (N-3(-)) in water clusters and aqueous interfaces: A combined investigation by photoelectron spectroscopy, density functional calculations, and molecular dynamic, J. Phys. Chem. A, 2004, 108, 39, 7820-7826, https://doi.org/10.1021/jp0496396 . [all data]

Pellerite, Jackson, et al., 1981
Pellerite, M.J.; Jackson, R.L.; Brauman, J.I., Proton affinity of the gaseous azide Ion. The N-H bond dissociation enegry in HN₃, J. Phys. Chem., 1981, 85, 1624. [all data]

Franklin, Dibeler, et al., 1958
Franklin, J.L.; Dibeler, V.H.; Reese, R.M.; Krauss, M., Ionization and dissociation of hydrazoic acid and methyl azide by electron impact, J. Am. Chem. Soc., 1958, 80, 298. [all data]

Calhorda, Gomes da Costa, et al., 1982
Calhorda, M.J.; Gomes da Costa, R.; Dias, A.R.; Martinho Simões, J.A., J. Chem. Soc., Dalton Trans., 1982, 2327.. [all data]

Dias, Dias, et al., 1987
Dias, A.R.; Dias, P.B.; Diogo, H.P.; Galvão, A.M.; Minas da Piedade, M.E.; Martinho Simões, J.A., Organometallics, 1987, 6, 1427. [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]

Bastide and Maier, 1976
Bastide, J.; Maier, J.P., Electronic states of the radical cations of the 1,3-dipoles: HCNO, CH₂N₂, and N₃H, studied by photoelectron spectroscopy, Chem. Phys., 1976, 12, 177. [all data]

Lee, Colton, et al., 1975
Lee, T.H.; Colton, R.J.; White, M.G.; Rabalais, J.W., Electronic structure of hydrazoic acid and the azide ion from x-ray ultraviolet electron spectroscopy, J. Am. Chem. Soc., 1975, 97, 4845. [all data]

Cradock, Ebsworth, et al., 1972
Cradock, S.; Ebsworth, E.A.V.; Murdoch, J.D., Photoelectron spectra of some Group 4 pseudohalides and related compounds, J. Chem. Soc. Faraday Trans. 2, 1972, 68, 86. [all data]

Eland, 1970
Eland, J.H.D., The photoelectron spectra of isocyanic acid and related compounds, Phil. Trans. Roy. Soc. (London), 1970, A268, 87. [all data]

Cvitas and Klasinc, 1976
Cvitas, T.; Klasinc, L., High resolution photoelectron spectrum of hydrazoic acid, J. Chem. Soc. Faraday Trans. 2, 1976, 72, 1240. [all data]

Shimanouchi, 1972
Shimanouchi, T., Tables of Molecular Vibrational Frequencies Consolidated Volume II, J. Phys. Chem. Ref. Data, 1972, 6, 3, 993-1102. [all data]

Shimoda, Peralta, et al., 1996
Shimoda, M.; Peralta, R.R.; Osajima, Y., Headspace gas analysis of fish sauce, J. Agric. Food Chem., 1996, 44, 11, 3601-3605, https://doi.org/10.1021/jf960345u . [all data]

Notes

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• Symbols used in this document:
  

  AE	Appearance energy
  IE (evaluated)	Recommended ionization energy
  d(ln(kH))/d(1/T)	Temperature dependence parameter for Henry's Law constant
  k°H	Henry's Law constant at 298.15K
  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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