Argon

• Formula: Ar
• Molecular weight: 39.948
• IUPAC Standard InChI: InChI=1S/Ar Copy

  
• IUPAC Standard InChIKey: XKRFYHLGVUSROY-UHFFFAOYSA-N Copy
• CAS Registry Number: 7440-37-1
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: Ar; UN 1006; UN 1951; argon atom
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Reaction thermochemistry data (reactions 51 to 100)
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data: reactions 1 to 50, reactions 101 to 102
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • Mass spectrum (electron ionization)
  • Fluid Properties
• Data at other public NIST sites:
  • NIST Atomic Spectra Database - Lines Holdings (on physics web site)
  • NIST Atomic Spectra Database - Levels Holdings (on physics web site)
  • NIST Atomic Spectra Database - Ground states and ionization energies (on physics web site)
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
  • X-ray Photoelectron Spectroscopy Database, version 5.0
  • X-ray Photoelectron Spectroscopy Database, version 5.0
  • X-ray Photoelectron Spectroscopy Database, version 5.0
  • X-ray Photoelectron Spectroscopy Database, version 5.0
  • X-ray Photoelectron Spectroscopy Database, version 5.0
  • X-ray Photoelectron Spectroscopy Database, version 5.0
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess
RCD - Robert C. Dunbar

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.

Reactions 51 to 100

(Ar⁺ • 4) +  = (Ar⁺ • 5)

By formula: (Ar⁺ • 4Ar) + Ar = (Ar⁺ • 5Ar)

(Ar⁺ • 5) +  = (Ar⁺ • 6)

By formula: (Ar⁺ • 5Ar) + Ar = (Ar⁺ • 6Ar)

(Ar⁺ • 6) +  = (Ar⁺ • 7)

By formula: (Ar⁺ • 6Ar) + Ar = (Ar⁺ • 7Ar)

(Ar⁺ • 7) +  = (Ar⁺ • 8)

By formula: (Ar⁺ • 7Ar) + Ar = (Ar⁺ • 8Ar)

(Ar⁺ • 8) +  = (Ar⁺ • 9)

By formula: (Ar⁺ • 8Ar) + Ar = (Ar⁺ • 9Ar)

(H₃⁺ • 2) +  = (H₃⁺ • 3)

By formula: (H₃⁺ • 2Ar) + Ar = (H₃⁺ • 3Ar)

(H₃⁺ • 3) +  = (H₃⁺ • 4)

By formula: (H₃⁺ • 3Ar) + Ar = (H₃⁺ • 4Ar)

(H₃⁺ • 4) +  = (H₃⁺ • 5)

By formula: (H₃⁺ • 4Ar) + Ar = (H₃⁺ • 5Ar)

(H₃⁺ • 5) +  = (H₃⁺ • 6)

By formula: (H₃⁺ • 5Ar) + Ar = (H₃⁺ • 6Ar)

(H₃⁺ • 6) +  = (H₃⁺ • 7)

By formula: (H₃⁺ • 6Ar) + Ar = (H₃⁺ • 7Ar)

(D₃⁺ • ) +  = (D₃⁺ • 2)

By formula: (D₃⁺ • Ar) + Ar = (D₃⁺ • 2Ar)

(H₃⁺ • ) +  = (H₃⁺ • 2)

By formula: (H₃⁺ • Ar) + Ar = (H₃⁺ • 2Ar)

( • 2) +  = ( • 3)

By formula: (CH₃⁺ • 2Ar) + Ar = (CH₃⁺ • 3Ar)

( • 3) +  = ( • 4)

By formula: (CH₃⁺ • 3Ar) + Ar = (CH₃⁺ • 4Ar)

( • 4) +  = ( • 5)

By formula: (CH₃⁺ • 4Ar) + Ar = (CH₃⁺ • 5Ar)

( • 5) +  = ( • 6)

By formula: (CH₃⁺ • 5Ar) + Ar = (CH₃⁺ • 6Ar)

( • 6) +  = ( • 7)

By formula: (CH₃⁺ • 6Ar) + Ar = (CH₃⁺ • 7Ar)

( • ) +  = ( • 2)

By formula: (CH₃⁺ • Ar) + Ar = (CH₃⁺ • 2Ar)

( • 2) +  = ( • 3)

By formula: (N₂⁺ • 2Ar) + Ar = (N₂⁺ • 3Ar)

( • 3) +  = ( • 4)

By formula: (N₂⁺ • 3Ar) + Ar = (N₂⁺ • 4Ar)

( • 4) +  = ( • 5)

By formula: (N₂⁺ • 4Ar) + Ar = (N₂⁺ • 5Ar)

( • 5) +  = ( • 6)

By formula: (N₂⁺ • 5Ar) + Ar = (N₂⁺ • 6Ar)

( • 6) +  = ( • 7)

By formula: (N₂⁺ • 6Ar) + Ar = (N₂⁺ • 7Ar)

 +  = ( • )

By formula: NO^- + Ar = (NO^- • Ar)

D₃⁺ +  = (D₃⁺ • )

By formula: D₃⁺ + Ar = (D₃⁺ • Ar)

 +  = ( • )

By formula: CH₃⁺ + Ar = (CH₃⁺ • Ar)

 +  = ( • )

By formula: Br^- + Ar = (Br^- • Ar)

Kr⁺ +  = (Kr⁺ • )

By formula: Kr⁺ + Ar = (Kr⁺ • Ar)

( • 7) +  = ( • 8)

By formula: (CH₃⁺ • 7Ar) + Ar = (CH₃⁺ • 8Ar)

 +  = ( • )

By formula: O₂^- + Ar = (O₂^- • Ar)

 +  = ( • )

By formula: H₂⁺ + Ar = (H₂⁺ • Ar)

N⁺ +  = (N⁺ • )

By formula: N⁺ + Ar = (N⁺ • Ar)

Enthalpy of reaction

CO⁺ +  = (CO⁺ • )

By formula: CO⁺ + Ar = (CO⁺ • Ar)

 +  = ( • )

By formula: I^- + Ar = (I^- • Ar)

Hg⁺ +  = (Hg⁺ • )

By formula: Hg⁺ + Ar = (Hg⁺ • Ar)

 +  = ( • )

By formula: CO₂⁺ + Ar = (CO₂⁺ • Ar)

 +  = ( • )

By formula: Fe⁺ + Ar = (Fe⁺ • Ar)

 +  = ( • )

By formula: Mg⁺ + Ar = (Mg⁺ • Ar)

 +  = ( • )

By formula: Co⁺ + Ar = (Co⁺ • Ar)

Ar₉NO^- + 10 = Ar₁₀NO^-

By formula: Ar₉NO^- + 10Ar = Ar₁₀NO^-

Ar₁₀NO^- + 11 = Ar₁₁NO^-

By formula: Ar₁₀NO^- + 11Ar = Ar₁₁NO^-

Ar₁₁NO^- + 12 = Ar₁₂NO^-

By formula: Ar₁₁NO^- + 12Ar = Ar₁₂NO^-

Ar₁₂NO^- + 13 = Ar₁₃NO^-

By formula: Ar₁₂NO^- + 13Ar = Ar₁₃NO^-

Ar₁₃NO^- + 14 = Ar₁₄NO^-

By formula: Ar₁₃NO^- + 14Ar = Ar₁₄NO^-

ArNO^- + 2 = Ar₂NO^-

By formula: ArNO^- + 2Ar = Ar₂NO^-

Ar₂NO^- + 3 = Ar₃NO^-

By formula: Ar₂NO^- + 3Ar = Ar₃NO^-

Ar₃NO^- + 4 = Ar₄NO^-

By formula: Ar₃NO^- + 4Ar = Ar₄NO^-

Ar₄NO^- + 5 = Ar₅NO^-

By formula: Ar₄NO^- + 5Ar = Ar₅NO^-

Ar₅NO^- + 6 = Ar₆NO^-

By formula: Ar₅NO^- + 6Ar = Ar₆NO^-

Ar₆NO^- + 7 = Ar₇NO^-

By formula: Ar₆NO^- + 7Ar = Ar₇NO^-

References

Go To: Top, Reaction thermochemistry data, Notes

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

Hiraoka and Mori, 1989
Hiraoka, K.; Mori, T., Formation and Stabilities of Cluster Ions Arn+, J. Chem. Phys., 1989, 90, 12, 7143, https://doi.org/10.1063/1.456245 . [all data]

Hiraoka and Mori, 1989, 2
Hiraoka, K.; Mori, T., Isotope Effect and Nature of Bonding in the Cluster Ions H3+(Ar)n and D3+(Ar)n, J. Chem. Phys., 1989, 91, 8, 4821, https://doi.org/10.1063/1.456720 . [all data]

Hiraoka, Kudaka, et al., 1991
Hiraoka, K.; Kudaka, I.; Yamabe, S., A Charge-Transfer Complex CH3+ Ar in the Gas Phase, Chem. Phys. Lett., 1991, 178, 1, 103, https://doi.org/10.1016/0009-2614(91)85060-A . [all data]

Hiraoka, Mori, et al., 1992
Hiraoka, K.; Mori, T.; Yamabe, S., Gas-Phase Solvation of N2+ with Ar Atoms - A Charge Switch in the Reaction N2+(Ar)...Ar+(N2), Chem. Phys. Lett., 1992, 189, 1, 7, https://doi.org/10.1016/0009-2614(92)85144-Y . [all data]

Hendricks, de Clercq, et al., 2002
Hendricks, J.H.; de Clercq, H.L.; Freidhoff, C.B.; Arnold, S.T.; Eaton, J.G.; Fancher, C.; Lyapustina, S.A.; S., Anion solvation at the microscopic level: Photoelectron spectroscopy of the solvated anion clusters, NO-(Y)(n), where Y=Ar, Kr, Xe, N2O, H2S, NH3, H2O, and C2H4(OH)(2), J. Chem. Phys., 2002, 116, 18, 7926-7938, https://doi.org/10.1063/1.1457444 . [all data]

Bowen and Eaton, 1988
Bowen, K.H.; Eaton, J.G., Photodetachment Spectroscopy of Negative Cluster Ions, in The Structure of Small Molecules and Ions, Ed. R. Naaman, Z. Vager, Plenum NY, 1988, 1988, p.147-169. [all data]

Zhao, Yourshaw, et al., 1994
Zhao, Y.X.; Yourshaw, I.; Reiser, G.; Arnold, C.C.; Neumark, D.M., Study of the ArBr(-), ArI(-), and KrI(-) anions and the corresponding neutral van der Waals complexes by anion zero electron kinetic energy, J. Chem. Phys., 1994, 101, 8, 6538, https://doi.org/10.1063/1.468500 . [all data]

Gatland, 1984
Gatland, I.R., Determination of Ion-Atom Potentials from Mobility Experiments. in Swarms of Ions and Electrons In Gases, W. Lindinger, Ed., Springer-Verlag, NY,, 1984, 44. [all data]

Dehmer and Pratt, 1982
Dehmer, P.M.; Pratt, S.T., Photoionization of ArKr, ArXe, and KrXe and bond dissociation energies of the rare gas dimer ions, J. Chem. Phys., 1982, 77, 4804. [all data]

Ng, Tiedemann, et al., 1977
Ng, C.Y.; Tiedemann, P.W.; Mahan, B.H.; Lee, Y.T., Photoionization Studies of the Diatomic Internuclear Rare Gas Molecules XeKr, XeAr, and KrAr, J. Chem. Phys., 1977, 66, 12, 5737, https://doi.org/10.1063/1.433848 . [all data]

Bedford and Smith, 1990
Bedford, D.K.; Smith, D., Variable-temperature selected ion flow tube studies of the reactions of Ar+, Ar2+ and ArHn+ (n=1-3) ions with H2, HD and D2 at 300 K and 80 K, Int. J. Mass Spectrom. Ion Proc., 1990, 98, 2, 179, https://doi.org/10.1016/0168-1176(90)85017-V . [all data]

Haynes, Freysinger, et al., 1995
Haynes, C.L.; Freysinger, W.; Armentrout, P.B., Collision-induced dissociation of N₃⁺(X³-) with Ne, Ar, Kr, and Xe, Int. J. Mass Spectrom. Ion Processes, 1995, 149/150, 267. [all data]

Norwood, Guo, et al., 1989
Norwood, K.; Guo, J.H.; Luo, G.; Ng, C.Y., A Study of Intramolecular Charge Transfer in Mixed Ar/Co Dimer and Trimer Ions Using the Photoion - Photoelectron Coincidence Method, Chem. Phys., 1989, 129, 1, 109, https://doi.org/10.1016/0301-0104(89)80023-0 . [all data]

Linn, Brom, et al., 1985
Linn, S.H.; Brom, J.M., Jr.; Tzeng, W.-B.; Ng, C.Y., Photoionization study of HgAr, J. Chem. Phys., 1985, 82, 648. [all data]

Pratt and Dehmer, 1983
Pratt, S.T.; Dehmer, P.M., On the Dissociation Energy of ArCO2+, J. Chem. Phys., 1983, 78, 10, 6336, https://doi.org/10.1063/1.444561 . [all data]

Rodgers and Armentrout, 2000
Rodgers, M.T.; Armentrout, P.B., Noncovalent Metal-Ligand Bond Energies as Studied by Threshold Collision-Induced Dissociation, Mass Spectrom. Rev., 2000, 19, 4, 215, https://doi.org/10.1002/1098-2787(200007)19:4<215::AID-MAS2>3.0.CO;2-X . [all data]

Andersen, Muntean, et al., 2000
Andersen, A.; Muntean, F.; Walter, D.; Rue, C.; Armentrout, P.B., Collision-Induced Dissociation and Theoretical Studies of Mg+ Complexes with CO, CO2, NH3, CH4, CH3OH, and C6H6, J. Phys. Chem. A, 2000, 104, 4, 692, https://doi.org/10.1021/jp993031t . [all data]

Asher, Bellert, et al., 1994
Asher, R.L.; Bellert, D.; Buthelezi, T.; Brucat, P.J., The Bond Strength of Ni2+, Chem. Phys. Lett., 1994, 224, 5-6, 529, https://doi.org/10.1016/0009-2614(94)00574-5 . [all data]

Notes

Go To: Top, Reaction thermochemistry data, References

• Symbols used in this document:
  

  T	Temperature
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions

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