Argon
- Formula: Ar
- Molecular weight: 39.948
- IUPAC Standard InChIKey: XKRFYHLGVUSROY-UHFFFAOYSA-N
- 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:
- Other data available:
- 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)
- Computational Chemistry Comparison and Benchmark Database
- Gas Phase Kinetics Database
- X-ray Photoelectron Spectroscopy Database, version 4.1
- X-ray Photoelectron Spectroscopy Database, version 4.1
- X-ray Photoelectron Spectroscopy Database, version 4.1
- X-ray Photoelectron Spectroscopy Database, version 4.1
- X-ray Photoelectron Spectroscopy Database, version 4.1
- X-ray Photoelectron Spectroscopy Database, version 4.1
- X-ray Photoelectron Spectroscopy Database, version 4.1
- X-ray Photoelectron Spectroscopy Database, version 4.1
- Options:
Data at NIST subscription sites:
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Ion clustering data
Go To: Top, 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
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. Searches may be limited to ion clustering reactions. A general reaction search form is also available.
Clustering reactions
By formula: Ar+ + Ar = (Ar+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 100. ± 90. | kJ/mol | AVG | N/A | Average of 5 out of 7 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 53.6 | J/mol*K | PHPMS | Teng and Conway, 1973 | gas phase; switching reaction(N2+)Ar; Turner and Conway, 1979, Liu and Conway, 1975; M |
By formula: (Ar+ Ar) + Ar = (Ar+
2Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 21.2 ± 0.3 | kJ/mol | PHPMS | Turner and Conway, 1979 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 84.9 | J/mol*K | PHPMS | Turner and Conway, 1979 | gas phase; M |
By formula: (Ar+ 2Ar) + Ar = (Ar+
3Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 20. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 72.4 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Free energy of reaction
![]() |
T (K) | Method | Reference | Comment |
---|---|---|---|---|
8.4 | 77. | PHPMS | Teng and Conway, 1973 | gas phase; M |
By formula: (Ar+ 3Ar) + Ar = (Ar+
4Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 7.0 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 58.2 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ 4Ar) + Ar = (Ar+
5Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.8 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 67.4 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ 5Ar) + Ar = (Ar+
6Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.8 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 71.1 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ 6Ar) + Ar = (Ar+
7Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.7 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 72.8 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ 7Ar) + Ar = (Ar+
8Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.7 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 72.8 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ 8Ar) + Ar = (Ar+
9Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.6 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 72.4 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ 9Ar) + Ar = (Ar+
10Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.49 ± 0.84 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 71.5 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ 10Ar) + Ar = (Ar+
11Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.5 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 72.8 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: ArNO- + 2Ar = Ar2NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.28 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar2NO- + 3Ar = Ar3NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 5.44 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar3NO- + 4Ar = Ar4NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 5.44 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar4NO- + 5Ar = Ar5NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 5.44 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar5NO- + 6Ar = Ar6NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 5.02 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar6NO- + 7Ar = Ar7NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 3.8 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar7NO- + 8Ar = Ar8NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 3.8 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar8NO- + 9Ar = Ar9NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 2.9 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar9NO- + 10Ar = Ar10NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 2.9 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar10NO- + 11Ar = Ar11NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 2.5 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar11NO- + 12Ar = Ar12NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 2.9 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar12NO- + 13Ar = Ar13NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 1.3 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar13NO- + 14Ar = Ar14NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.84 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Br- + Ar = (Br- Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 3.3 | kJ/mol | Ther | Zhao, Yourshaw, et al., 1994 | gas phase; B |
![]() | 5.86 | kJ/mol | Mobl | Gatland, 1984 | gas phase; B,M |
By formula: CH3+ + Ar = (CH3+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 47.3 ± 8.4 | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 84.1 | J/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ Ar) + Ar = (CH3+
2Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 9.5 ± 0.8 | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 65.7 | J/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ 2Ar) + Ar = (CH3+
3Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 8.2 ± 0.8 | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 93.3 | J/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ 3Ar) + Ar = (CH3+
4Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 8.2 ± 0.8 | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 88.3 | J/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ 4Ar) + Ar = (CH3+
5Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 8.1 ± 0.8 | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 86.2 | J/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ 5Ar) + Ar = (CH3+
6Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 8. ± 1. | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 87.9 | J/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ 6Ar) + Ar = (CH3+
7Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 8. ± 2. | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 88.7 | J/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ 7Ar) + Ar = (CH3+
8Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 8.08 | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; Entropy change calculated or estimated; M |
By formula: CO+ + Ar = (CO+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 67.4 ± 5.9 | kJ/mol | PIPECO | Norwood, Guo, et al., 1989 | gas phase; CO+(X) ground state; M |
By formula: CO2+ + Ar = (CO2+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 25. | kJ/mol | PI | Pratt and Dehmer, 1983 | gas phase; M |
By formula: Co+ + Ar = (Co+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 49.4 | kJ/mol | PDis | Asher, Bellert, et al., 1994 | RCD |
By formula: Cr+ + Ar = (Cr+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 29. ± 2. | kJ/mol | SIDT | Kemper, Hsu, et al., 1991 | gas phase; «DELTA»rH(0 K) = 27.4 kJ/mol, «DELTA»rS(100 K) = 60.2 J/mol*K; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 66.1 | J/mol*K | SIDT | Kemper, Hsu, et al., 1991 | gas phase; «DELTA»rH(0 K) = 27.4 kJ/mol, «DELTA»rS(100 K) = 60.2 J/mol*K; M |
By formula: Cs+ + Ar = (Cs+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 8.16 | kJ/mol | IMob | Gatland, 1984, 2 | gas phase; M |
![]() | 6.11 | kJ/mol | SCATTERING | Gislason, 1984 | gas phase; M |
![]() | 8.20 | kJ/mol | IMob | Viehland, 1984 | gas phase; M |
![]() | 9.54 | kJ/mol | IMob | Takebe, 1983 | gas phase; M |
![]() | 9.6 | kJ/mol | IMob | Takebe, 1983 | gas phase; values from this reference are consistently too high; M |
By formula: D3+ + Ar = (D3+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 29.1 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 60.7 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ Ar) + Ar = (D3+
2Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 20.1 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 73.2 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ 2Ar) + Ar = (D3+
3Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 18.6 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 77.0 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ 3Ar) + Ar = (D3+
4Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 10.2 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 69.5 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ 4Ar) + Ar = (D3+
5Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 9.5 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 72.8 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ 5Ar) + Ar = (D3+
6Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 9.1 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 79.9 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ 6Ar) + Ar = (D3+
7Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.5 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 105. | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
+
= ArF-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 8.37 | kJ/mol | TDAs | Wada, Kikkawa, et al., 2007 | gas phase; Entropy estimated; B |
Quantity | Value | Units | Method | Reference | Comment |
![]() | -16.6 | kJ/mol | TDAs | Wada, Kikkawa, et al., 2007 | gas phase; Entropy estimated; B |
By formula: Fe+ + Ar = (Fe+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 11. ± 7.9 | kJ/mol | CIDT | Rodgers and Armentrout, 2000 | RCD |
By formula: H2+ + Ar = (H2+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 100. | kJ/mol | SIFT | Bedford and Smith, 1990 | gas phase; switching reaction(Ar+)Ar, «DELTA»rH>; M |
By formula: H3+ + Ar = (H3+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 28.0 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
![]() | 31. ± 3. | kJ/mol | SIFT | Bedford and Smith, 1990 | gas phase; switching reaction(H3+)H2, Hiraoka and Mori, 1989, 2; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 56.1 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ Ar) + Ar = (H3+
2Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 19.1 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 66.9 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ 2Ar) + Ar = (H3+
3Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 17.9 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 72.4 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ 3Ar) + Ar = (H3+
4Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 10.3 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 67.4 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ 4Ar) + Ar = (H3+
5Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 9.5 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 69.9 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ 5Ar) + Ar = (H3+
6Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 9.1 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 78.2 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ 6Ar) + Ar = (H3+
7Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.5 ± 0.4 | kJ/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 96.2 | J/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: Hg+ + Ar = (Hg+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 22. ± 2. | kJ/mol | PI | Linn, Brom, et al., 1985 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 2.5 | kJ/mol | Ther | Zhao, Yourshaw, et al., 1994 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 12. ± 3. | kJ/mol | AVG | N/A | Average of 9 values; Individual data points |
By formula: Kr+ + Ar = (Kr+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 51.0 | kJ/mol | PI | Dehmer and Pratt, 1982 | gas phase; M |
![]() | 56.9 | kJ/mol | PI | Ng, Tiedemann, et al., 1977 | gas phase; M |
By formula: Li+ + Ar = (Li+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 30. ± 4. | kJ/mol | AVG | N/A | Average of 4 out of 6 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 30. | J/mol*K | DT | McKnight and Sawina, 1973 | gas phase; «DELTA»rS approximate; M |
Free energy of reaction
![]() |
T (K) | Method | Reference | Comment |
---|---|---|---|---|
5.9 | 294. | IMob | Cassidy and Elford, 1985 | gas phase; M |
7.9 | 319. | DT | Keller, Beyer, et al., 1973 | gas phase; LOW E/N; M |
11. | 215. | DT | McKnight and Sawina, 1973 | gas phase; «DELTA»rS approximate; M |
By formula: Mg+ + Ar = (Mg+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 9.6 ± 6.7 | kJ/mol | CIDT | Andersen, Muntean, et al., 2000 | RCD |
Enthalpy of reaction
![]() |
T (K) | Method | Reference | Comment |
---|---|---|---|---|
118. (+44.,-0.) | CID | Haynes, Freysinger, et al., 1995 | gas phase; giuded ion beam CID; M |
By formula: NO- + Ar = (NO- Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 5.4 ± 3.8 | kJ/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
![]() | 6.7 ± 1.3 | kJ/mol | N/A | Bowen and Eaton, 1988 | gas phase; B |
By formula: N2+ + Ar = (N2+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 112. | kJ/mol | PD/KERD | Kim and Bowers, 1990 | gas phase; switching reaction(N2+)N2; Hiraoka and Nakajima, 1988; M |
![]() | 106. | kJ/mol | PHPMS | Teng and Conway, 1973 | gas phase; switching reaction(N2+)N2; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 81.6 | J/mol*K | PD/KERD | Kim and Bowers, 1990 | gas phase; switching reaction(N2+)N2; Hiraoka and Nakajima, 1988; M |
![]() | 57.3 | J/mol*K | PHPMS | Teng and Conway, 1973 | gas phase; switching reaction(N2+)N2; M |
By formula: (N2+ Ar) + Ar = (N2+
2Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 16. | kJ/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; «DELTA»rH>; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 71. | J/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; «DELTA»rH>; M |
By formula: (N2+ 2Ar) + Ar = (N2+
3Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 7.3 ± 0.8 | kJ/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 57.3 | J/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
By formula: (N2+ 3Ar) + Ar = (N2+
4Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 7.0 ± 0.8 | kJ/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 74.9 | J/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
By formula: (N2+ 4Ar) + Ar = (N2+
5Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.6 ± 0.8 | kJ/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 71.1 | J/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
By formula: (N2+ 5Ar) + Ar = (N2+
6Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.5 ± 0.8 | kJ/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 72.8 | J/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
By formula: (N2+ 6Ar) + Ar = (N2+
7Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.4 ± 0.8 | kJ/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 72.4 | J/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
By formula: (N2+ 7Ar) + Ar = (N2+
8Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.40 | kJ/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 71. | J/mol*K | N/A | Hiraoka, Mori, et al., 1992 | gas phase; Entropy change calculated or estimated; M |
By formula: (N2+ 8Ar) + Ar = (N2+
9Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.36 | kJ/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 71. | J/mol*K | N/A | Hiraoka, Mori, et al., 1992 | gas phase; Entropy change calculated or estimated; M |
By formula: Na+ + Ar = (Na+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 15. ± 8.8 | kJ/mol | CIDT | Armentrout and Rodgers, 2000 | RCD |
![]() | 15.5 | kJ/mol | SCATTERING | Gislason, 1984 | gas phase; M |
![]() | 18.4 | kJ/mol | IMob | Viehland, 1984 | gas phase; M |
![]() | 18. | kJ/mol | DT | McKnight and Sawina, 1973 | gas phase; M |
![]() | 20.4 | kJ/mol | IMob | Takebe, 1983 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 9.2 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- Ar) + Ar = (O-
2Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 8.4 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 2Ar) + Ar = (O-
3Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.7 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 3Ar) + Ar = (O-
4Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 5.9 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 4Ar) + Ar = (O-
5Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 5.0 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 5Ar) + Ar = (O-
6Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 5.0 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 6Ar) + Ar = (O-
7Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 4.2 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 7Ar) + Ar = (O-
8Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 4. ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 8Ar) + Ar = (O-
9Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 4. ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 9Ar) + Ar = (O-
10Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 3. ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 10Ar) + Ar = (O-
11Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 2. ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 11Ar) + Ar = (O-
12Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 3. ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 12Ar) + Ar = (O-
13Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.8 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 13Ar) + Ar = (O-
14Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.8 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 14Ar) + Ar = (O-
15Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 2. ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 15Ar) + Ar = (O-
16Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.4 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 16Ar) + Ar = (O-
17Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.4 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 17Ar) + Ar = (O-
18Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.8 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 18Ar) + Ar = (O-
19Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.4 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 19Ar) + Ar = (O-
20Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.4 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 20Ar) + Ar = (O-
21Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.4 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 21Ar) + Ar = (O-
22Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.4 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 22Ar) + Ar = (O-
23Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.4 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 23Ar) + Ar = (O-
24Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.4 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 24Ar) + Ar = (O-
25Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.8 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: (O- 25Ar) + Ar = (O-
26Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 0.8 ± 8.4 | kJ/mol | N/A | Arnold, Hendricks, et al., 1995 | gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B |
By formula: O2- + Ar = (O2- Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 6.95 | kJ/mol | N/A | Bowen and Eaton, 1988 | gas phase; Bound by 70 meV relative to EA(O2-.); B |
By formula: Rb+ + Ar = (Rb+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 8.49 | kJ/mol | IMob | Gatland, 1984, 2 | gas phase; M |
![]() | 8.28 | kJ/mol | IMob | Viehland, 1984 | gas phase; M |
![]() | 11.9 | kJ/mol | IMob | Takebe, 1983 | gas phase; M |
By formula: Xe+ + Ar = (Xe+ Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
![]() | 17. | kJ/mol | PI | Dehmer and Pratt, 1982 | gas phase; M |
![]() | 25. | kJ/mol | SIFT | Jones, Lister, et al., 1980 | gas phase; M |
![]() | 13. | kJ/mol | PI | Ng, Tiedemann, et al., 1977 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
![]() | 81.2 | J/mol*K | SIFT | Jones, Lister, et al., 1980 | gas phase; M |
References
Go To: Top, Ion clustering data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Teng and Conway, 1973
Teng, H.H.; Conway, D.C.,
Ion - Molecule Equilibria in Mixtures of N2 and Ar,
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Turner and Conway, 1979
Turner, D.L.; Conway, D.C.,
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Liu and Conway, 1975
Liu, W.F.; Conway, D.C.,
Ion - Molecule Reactions in Ar at 296, 195, and 77 K,
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Formation and Stabilities of Cluster Ions Arn+,
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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),
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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,
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Gatland, 1984
Gatland, I.R.,
Determination of Ion-Atom Potentials from Mobility Experiments.
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Hiraoka, Kudaka, et al., 1991
Hiraoka, K.; Kudaka, I.; Yamabe, S.,
A Charge-Transfer Complex CH3+ Ar in the Gas Phase,
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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,
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Pratt and Dehmer, 1983
Pratt, S.T.; Dehmer, P.M.,
On the Dissociation Energy of ArCO2+,
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The Bond Strength of Ni2+,
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Kemper, Hsu, et al., 1991
Kemper, P.R.; Hsu, M.T.; Bowers, M.T.,
Transition - Metal Ion - Rare Gas Clusters: Bond Strengths and Molecular Parameters for Co+(He/Ne)n, Ni+(He/Ne)n, and Cr+(He/Ne/Ar),
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Swarms of Ions and Electrons in Gases, W. Lindinger, T. D. Mark and F. Howorka, eds. (Springer, New York, 1984, 1984, 44. [all data]
Gislason, 1984
Gislason, E.A.,
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Interaction Potentials for Li+ - Rare - Gas Systems,
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The Generalized Mobility Curve for Alkali Ions in Rare Gases: Clustering Reactions and Mobility Curves,
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Dehmer and Pratt, 1982
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Kim, H.S.; Bowers, M.T.,
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. [all data]
Notes
Go To: Top, Ion clustering data, References
- Symbols used in this document:
T Temperature rG°
Free energy of reaction at standard conditions rH°
Enthalpy of reaction at standard conditions rS°
Entropy of reaction at standard conditions - 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.
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