Nitric oxide

• Formula: NO
• Molecular weight: 30.0061
• IUPAC Standard InChI: InChI=1S/NO/c1-2 Copy

  
• IUPAC Standard InChIKey: MWUXSHHQAYIFBG-UHFFFAOYSA-N Copy
• CAS Registry Number: 10102-43-9
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Nitrogen oxide; Nitrogen monoxide; Nitrosyl radical; NO; Amidogen, oxo-; Nitrogen oxide (NO); UN 1660
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Constants of diatomic molecules
• Data at other public NIST sites:
  • Microwave spectra (on physics lab web site)
  • Electron-Impact Ionization Cross Sections (on physics web site)
  • Gas Phase Kinetics Database
• Options:
  • Switch to calorie-based units

Data at NIST subscription sites:

• NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data)
• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.

Gas phase thermochemistry data

Go To: Top, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), References, Notes

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.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

View table.

Phase change data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), 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: William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), 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
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.

Individual Reactions

 +  = ( • )

By formula: NO^- + NO = (NO^- • NO)

Free energy of reaction

( • ) +  = ( • 2)

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

Free energy of reaction

( • ) +  = ( • 2)

By formula: (Ni⁺ • NO) + NO = (Ni⁺ • 2NO)

Enthalpy of reaction

 +  = ( • )

By formula: Ni⁺ + NO = (Ni⁺ • NO)

Enthalpy of reaction

( • 2) +  = ( • 3)

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

( • 3) +  = ( • 4)

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

( • 4) +  = ( • 5)

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

=  + 

By formula: C₂H₅NO₂ = NO + C₂H₅O

Henry's Law data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), 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)

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

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), 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 NO⁺ (ion structure unspecified)

Proton affinity at 298K

Ionization energy determinations

Appearance energy determinations

Anion protonation reactions

 +  =

By formula: NO^- + H⁺ = HNO

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), 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: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

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

 +  = ( • )

By formula: NO^- + NO = (NO^- • NO)

Free energy of reaction

( • ) +  = ( • 2)

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

Free energy of reaction

( • 2) +  = ( • 3)

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

( • 3) +  = ( • 4)

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

( • 4) +  = ( • 5)

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

 +  = ( • )

By formula: Ni⁺ + NO = (Ni⁺ • NO)

Enthalpy of reaction

( • ) +  = ( • 2)

By formula: (Ni⁺ • NO) + NO = (Ni⁺ • 2NO)

Enthalpy of reaction

IR Spectrum

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), 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: Coblentz Society, Inc.

Gas Phase Spectrum

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

For Zoom

1.) Enter the desired X axis range (e.g., 100, 200)

2.) Check here for automatic Y scaling

3.) Press here to zoom

Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

For Zoom

1.) Enter the desired X axis range (e.g., 100, 200)

2.) Check here for automatic Y scaling

3.) Press here to zoom

Additional Data

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), 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]

Johnston and Giauque, 1929
Johnston, H.L.; Giauque, W.F., THE HEAT CAPACITY OF NITRIC OXIDE FROM 14°K. TO THE BOILING POINT AND THE HEAT OF VAPORIZATION. VAPOR PRESSURES OF SOLID AND LIQUID PHASES. THE ENTROPY FROM SPECTROSCOPIC DATA, J. Am. Chem. Soc., 1929, 51, 11, 3194-3214, https://doi.org/10.1021/ja01386a004 . [all data]

Linn, Ono, et al., 1981
Linn, S.H.; Ono, Y.; Ng, C.Y., Molecular Beam Photoionization Study of CO, N2, and NO Dimers and Clusters, J. Chem. Phys., 1981, 74, 6, 3342, https://doi.org/10.1063/1.441486 . [all data]

Ng, Tiedemann, et al., 1977
Ng, C.Y.; Tiedemann, P.W.; Mahan, B.H.; Lee, Y.T., The Binding Energy between NO and NO+, J. Chem. Phys., 1977, 66, 9, 3985, https://doi.org/10.1063/1.434450 . [all data]

Puckett and Teague, 1971
Puckett, L.J.; Teague, A.W., Production of H3O+.nH2O from NO+ Precursor in NO - H2O Gas Mixtures, J. Chem. Phys., 1971, 54, 6, 2564, https://doi.org/10.1063/1.1675213 . [all data]

Khan, Steele, et al., 1995
Khan, F.A.; Steele, D.L.; Armentrout, P.B., Ligand effects in organometallic thermochemistry: The sequential bond energies of Ni(CO)_x⁺ and Ni(N₂)_x⁺ (x = 1-4) and Ni(NO)_x⁺ (x = 1-3) [Data derived from reported bond energies taking value of 8.273±0.046 eV for IE[Ni(CO)₄]], J. Phys. Chem., 1995, 99, 7819. [all data]

Rebbert and Laidler, 1952
Rebbert, R.E.; Laidler, K.J., Kinetics of the decomposition of diethyl peroxide, J. Chem. Phys., 1952, 20, 574-577. [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]

Kuo, Zhang, et al., 1997
Kuo, S.C.; Zhang, Z.Y.; Ross, S.K.; Klemm, R.B.; Johnson, R.D.; Monks, P.S.; Thorn, R.P.; Stief, L.J., Discharge flow-photoionization mass spectrometric study of HNO: Phtoionization efficiency spectrum and ionization energy and proton affinity of NO, J. Phys. Chem. A, 1997, 101, 4035. [all data]

Reiser, Habenicht, et al., 1988
Reiser, G.; Habenicht, W.; Muller-Dethlefs, K.; Schlag, E.W., The ionization energy of nitric oxide, Chem. Phys. Lett., 1988, 152, 119. [all data]

Sander, Chewter, et al., 1987
Sander, N.; Chewter, L.A.; Muller-Dethlefs, K.; Schlag, E.W., High-resolution zero-kinetic-energy photoelectron spectroscopy of nitric oxide, Phys. Rev. A:, 1987, 36, 4543. [all data]

Muller-Dethlefs, Sander, et al., 1984
Muller-Dethlefs, K.; Sander, M.; Schlag, E.W., Two-colour photoionization resonance spectroscopy of NO: Complete separation of rotational levels of NO⁺ + at the ionization threshold, Chem. Phys. Lett., 1984, 112, 291. [all data]

Seaver, Chupka, et al., 1983
Seaver, M.; Chupka, W.A.; Colson, S.D.; Gauyacq, D., Double resonance multiphoton ionization studies of high Rydberg states in NO, J. Phys. Chem., 1983, 87, 2226. [all data]

Ebata, Anezaki, et al., 1983
Ebata, T.; Anezaki, Y.; Fujii, M.; Mikami, N.; Ito, M., High Rydberg states of NO studied by two-color multiphoton spectroscopy, J. Phys. Chem., 1983, 87, 4773. [all data]

Fantoni, Giardini-Guidoni, et al., 1982
Fantoni, R.; Giardini-Guidoni, A.; Tiribelli, R., (e,2e) Spectroscopy of valence states of the NO molecule, J. Electron Spectrosc. Relat. Phenom., 1982, 26, 99. [all data]

Kim, Stephan, et al., 1981
Kim, Y.B.; Stephan, K.; Mark, E.; Mark, T.D., Single and double ionization of nitric oxide by electron impact from threshold up to 180 eV, J. Chem. Phys., 1981, 74, 6771. [all data]

Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S., Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]

Huber and Herzberg, 1979
Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules,, Van Nostrand Reinhold Co., 1979, ,1. [all data]

Miescher, 1976
Miescher, E., High resolution absorption spectrum of nitric oxide (NO) in the region of the first ionization limit, Can. J. Phys., 1976, 54, 2074. [all data]

Natalis, 1973
Natalis, P., Contribution a la spectroscopie photoelectronique. Effets de l'autoionisation dans less spectres photoelectroniques de molecules diatomiques et triatomiques, Acad. R. Belg. Mem. Cl. Sci. Collect. 8, 1973, 41, 1. [all data]

Edqvist, Asbrink, et al., 1971
Edqvist, O.; Asbrink, L.; Lindholm, E., On the photoelectron spectrum of NO, Z. Naturforsch. A:, 1971, 26, 1407. [all data]

Collin, Delwiche, et al., 1971
Collin, J.E.; Delwiche, J.; Natalis, P., Energy levels of NO⁺ ion by He and Ar resonance lines photoelectron spectrometry, Intern. J. Mass Spectrom. Ion Phys., 1971, 7, 19. [all data]

Hildenbrand, 1970
Hildenbrand, D.L., Electron impact studies of the IIA metal chlorides, Intern. J. Mass Spectrom. Ion Phys., 1970, 4, 75. [all data]

Cristy and Mamantov, 1970
Cristy, S.S.; Mamantov, G., Cryogenic mass spectrometry of reactive fluorine-containing species. I. The mass spectra of sulfur hexafluoride, chlorine trifluoride, chlorine monofluoride, nitrosyl fluoride and tetrafluorohydrazine, Intern. J. Mass Spectrom. Ion Phys., 1970, 5, 309. [all data]

Peatman, Borne, et al., 1969
Peatman, W.B.; Borne, T.B.; Schlag, E.W., Photoionization resonance spectra. I. Nitric oxide and benzene, Chem. Phys. Lett., 1969, 3, 492. [all data]

Jungen and Miescher, 1969
Jungen, C.; Miescher, E., Absorption spectrum of the NO molecule. IX. The structure of the f complexes, the ionization potential of NO, and the quadrupole moment of NO⁺, Can. J. Phys., 1969, 47, 1769. [all data]

Cantone, Emma, et al., 1968
Cantone, B.; Emma, V.; Grasso, F., Fine structure near the ionization threshold of Kr, O₂, and NO by electron impact, Adv. Mass Spectrom., 1968, 4, 599. [all data]

Hierl and Franklin, 1967
Hierl, P.M.; Franklin, J.L., Appearance potentials and kinetic energies of ions from N₂, CO, and NO, J. Chem. Phys., 1967, 47, 3154. [all data]

Dressler and Miescher, 1965
Dressler, K.; Miescher, E., Absorption spectrum of the NO molecule. V. Survey of excited states and theirinteractions, Astrophys. J., 1965, 141, 1266. [all data]

Nicholson, 1963
Nicholson, A.J.C., Photo-ionization efficiency curves. Measurement of ionization potentials and interpretation of fine structure, J. Chem. Phys., 1963, 39, 954. [all data]

Huber, 1961
Huber, K.P., Die Rydberg-Serien im Absorptions-spektrum des NO-Molekuls, Helv. Phys. Acta, 1961, 34, 929. [all data]

Watanabe, 1954
Watanabe, K., Photoionization and total absorption cross section of gases. I. Ionization potentials of several molecules. Cross sections of NH₃ and NO, J. Chem. Phys., 1954, 22, 1564. [all data]

Kibel and Nyberg, 1979
Kibel, M.H.; Nyberg, G.L., Angular distribution valence photoelectron spectra of nitric oxide, J. Electron Spectrosc. Relat. Phenom., 1979, 17, 1. [all data]

Erman, Karawajczyk, et al., 1995
Erman, P.; Karawajczyk, A.; Rachlew-Kallne, E.; Stromholm, C., Photoionization and photodissociation of nitric oxide in the range 9-35 eV, J. Chem. Phys., 1995, 102, 3064. [all data]

Oertel, Schenk, et al., 1980
Oertel, H.; Schenk, H.; Baumgartel, H., Ion pair formation from photon irradiation of O₂, NO and CO in 17-30 eV, Chem. Phys., 1980, 46, 251. [all data]

Locht and Momigny, 1971
Locht, R.; Momigny, J., Mass spectrometric study of ion-pair processes in diatomic molecules: H₂, CO, NO and O₂, Int. J. Mass Spectrom. Ion Phys., 1971, 7, 121. [all data]

Appell, Durup, et al., 1966
Appell, J.; Durup, J.; Heitz, F., Sur le seuil d'apparition des ions fragments produits avec exces d'energie cinetique, Advan. Mass Spectrom., 1966, 3, 457. [all data]

Cloutier and Schiff, 1959
Cloutier, G.G.; Schiff, H.I., Electron impact study of nitric oxide using a modified retarding potential difference method, J. Chem. Phys., 1959, 31, 793. [all data]

Doong and Bizot, 1973
Doong, P.; Bizot, M., Dissociation uni- et bi-moleculaire des ions NO⁺, Int. J. Mass Spectrom. Ion Phys., 1973, 10, 227. [all data]

Travers, Cowles, et al., 1989
Travers, M.J.; Cowles, D.C.; Ellison, G.B., Reinvestigation of the Electron Affinities of O2 and NO, Chem. Phys. Lett., 1989, 164, 5, 449, https://doi.org/10.1016/0009-2614(89)85237-6 . [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  AE	Appearance energy
  IE (evaluated)	Recommended ionization energy
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  T	Temperature
  d(ln(kH))/d(1/T)	Temperature dependence parameter for Henry's Law constant
  k°H	Henry's Law constant at 298.15K
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔvapH	Enthalpy of vaporization

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
• The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
• Customer support for NIST Standard Reference Data products.