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
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- Other data available:
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- 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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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 |
---|---|---|---|---|---|
ΔrH° | 20. ± 20. | kcal/mol | AVG | N/A | Average of 5 out of 7 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 12.8 | cal/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 |
---|---|---|---|---|---|
ΔrH° | 5.06 ± 0.08 | kcal/mol | PHPMS | Turner and Conway, 1979 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 20.3 | cal/mol*K | PHPMS | Turner and Conway, 1979 | gas phase; M |
By formula: (Ar+ • 2Ar) + Ar = (Ar+ • 3Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.9 ± 0.3 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.3 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Free energy of reaction
ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
2.0 | 77. | PHPMS | Teng and Conway, 1973 | gas phase; M |
By formula: (Ar+ • 3Ar) + Ar = (Ar+ • 4Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.7 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 13.9 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ • 4Ar) + Ar = (Ar+ • 5Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.6 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 16.1 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ • 5Ar) + Ar = (Ar+ • 6Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.6 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.0 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ • 6Ar) + Ar = (Ar+ • 7Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.6 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.4 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ • 7Ar) + Ar = (Ar+ • 8Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.6 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.4 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ • 8Ar) + Ar = (Ar+ • 9Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.6 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.3 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ • 9Ar) + Ar = (Ar+ • 10Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.55 ± 0.20 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.1 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (Ar+ • 10Ar) + Ar = (Ar+ • 11Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.6 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.4 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: ArNO- + 2Ar = Ar2NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.50 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar2NO- + 3Ar = Ar3NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.30 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar3NO- + 4Ar = Ar4NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.30 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar4NO- + 5Ar = Ar5NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.30 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar5NO- + 6Ar = Ar6NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.20 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar6NO- + 7Ar = Ar7NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 0.90 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar7NO- + 8Ar = Ar8NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 0.90 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar8NO- + 9Ar = Ar9NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 0.70 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar9NO- + 10Ar = Ar10NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 0.70 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar10NO- + 11Ar = Ar11NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 0.60 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar11NO- + 12Ar = Ar12NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 0.70 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar12NO- + 13Ar = Ar13NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 0.30 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Ar13NO- + 14Ar = Ar14NO-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 0.20 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
By formula: Br- + Ar = (Br- • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 0.80 | kcal/mol | Ther | Zhao, Yourshaw, et al., 1994 | gas phase; B |
ΔrH° | 1.40 | kcal/mol | Mobl | Gatland, 1984 | gas phase; B,M |
By formula: CH3+ + Ar = (CH3+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11.3 ± 2.0 | kcal/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 20.1 | cal/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ • Ar) + Ar = (CH3+ • 2Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.3 ± 0.2 | kcal/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 15.7 | cal/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ • 2Ar) + Ar = (CH3+ • 3Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.0 ± 0.2 | kcal/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 22.3 | cal/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ • 3Ar) + Ar = (CH3+ • 4Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.0 ± 0.2 | kcal/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.1 | cal/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ • 4Ar) + Ar = (CH3+ • 5Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.9 ± 0.2 | kcal/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 20.6 | cal/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ • 5Ar) + Ar = (CH3+ • 6Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.9 ± 0.3 | kcal/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.0 | cal/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ • 6Ar) + Ar = (CH3+ • 7Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.9 ± 0.4 | kcal/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.2 | cal/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase; M |
By formula: (CH3+ • 7Ar) + Ar = (CH3+ • 8Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.93 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 16.1 ± 1.4 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 6.0 | kcal/mol | PI | Pratt and Dehmer, 1983 | gas phase; M |
By formula: Co+ + Ar = (Co+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11.8 | kcal/mol | PDis | Asher, Bellert, et al., 1994 | RCD |
By formula: Cr+ + Ar = (Cr+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6.9 ± 0.4 | kcal/mol | SIDT | Kemper, Hsu, et al., 1991 | gas phase; ΔrH(0 K) = 6.55 kcal/mol, ΔrS(100 K) = 14.4 cal/mol*K; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 15.8 | cal/mol*K | SIDT | Kemper, Hsu, et al., 1991 | gas phase; ΔrH(0 K) = 6.55 kcal/mol, ΔrS(100 K) = 14.4 cal/mol*K; M |
By formula: Cs+ + Ar = (Cs+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.95 | kcal/mol | IMob | Gatland, 1984, 2 | gas phase; M |
ΔrH° | 1.46 | kcal/mol | SCATTERING | Gislason, 1984 | gas phase; M |
ΔrH° | 1.96 | kcal/mol | IMob | Viehland, 1984 | gas phase; M |
ΔrH° | 2.28 | kcal/mol | IMob | Takebe, 1983 | gas phase; M |
ΔrH° | 2.3 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 7.0 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 14.5 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ • Ar) + Ar = (D3+ • 2Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.8 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.5 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ • 2Ar) + Ar = (D3+ • 3Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.4 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 18.4 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ • 3Ar) + Ar = (D3+ • 4Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.4 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 16.6 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ • 4Ar) + Ar = (D3+ • 5Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.3 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.4 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ • 5Ar) + Ar = (D3+ • 6Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.2 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.1 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (D3+ • 6Ar) + Ar = (D3+ • 7Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.6 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 25.2 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
+ = ArF-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.00 | kcal/mol | TDAs | Wada, Kikkawa, et al., 2007 | gas phase; Entropy estimated; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -3.96 | kcal/mol | TDAs | Wada, Kikkawa, et al., 2007 | gas phase; Entropy estimated; B |
By formula: Fe+ + Ar = (Fe+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.6 ± 1.9 | kcal/mol | CIDT | Rodgers and Armentrout, 2000 | RCD |
By formula: H2+ + Ar = (H2+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 24. | kcal/mol | SIFT | Bedford and Smith, 1990 | gas phase; switching reaction(Ar+)Ar, ΔrH>; M |
By formula: H3+ + Ar = (H3+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6.7 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
ΔrH° | 7.5 ± 0.8 | kcal/mol | SIFT | Bedford and Smith, 1990 | gas phase; switching reaction(H3+)H2, Hiraoka and Mori, 1989, 2; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 13.4 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ • Ar) + Ar = (H3+ • 2Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.6 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 16.0 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ • 2Ar) + Ar = (H3+ • 3Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.3 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.3 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ • 3Ar) + Ar = (H3+ • 4Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.5 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 16.1 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ • 4Ar) + Ar = (H3+ • 5Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.3 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 16.7 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ • 5Ar) + Ar = (H3+ • 6Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.2 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 18.7 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: (H3+ • 6Ar) + Ar = (H3+ • 7Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.6 ± 0.1 | kcal/mol | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 23.0 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989, 2 | gas phase; M |
By formula: Hg+ + Ar = (Hg+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 5.3 ± 0.4 | kcal/mol | PI | Linn, Brom, et al., 1985 | gas phase; M |
By formula: I- + Ar = (I- • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 0.60 | kcal/mol | Ther | Zhao, Yourshaw, et al., 1994 | gas phase; B |
By formula: K+ + Ar = (K+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.8 ± 0.7 | kcal/mol | AVG | N/A | Average of 9 values; Individual data points |
By formula: Kr+ + Ar = (Kr+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 12.2 | kcal/mol | PI | Dehmer and Pratt, 1982 | gas phase; M |
ΔrH° | 13.6 | kcal/mol | PI | Ng, Tiedemann, et al., 1977 | gas phase; M |
By formula: Li+ + Ar = (Li+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7. ± 1. | kcal/mol | AVG | N/A | Average of 4 out of 6 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 7. | cal/mol*K | DT | McKnight and Sawina, 1973 | gas phase; ΔrS approximate; M |
Free energy of reaction
ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
1.4 | 294. | IMob | Cassidy and Elford, 1985 | gas phase; M |
1.9 | 319. | DT | Keller, Beyer, et al., 1973 | gas phase; LOW E/N; M |
2.6 | 215. | DT | McKnight and Sawina, 1973 | gas phase; ΔrS approximate; M |
By formula: Mg+ + Ar = (Mg+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.3 ± 1.6 | kcal/mol | CIDT | Andersen, Muntean, et al., 2000 | RCD |
By formula: N+ + Ar = (N+ • Ar)
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
28. (+11.,-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 |
---|---|---|---|---|---|
ΔrH° | 1.30 ± 0.90 | kcal/mol | N/A | Hendricks, de Clercq, et al., 2002 | gas phase; B |
ΔrH° | 1.60 ± 0.30 | kcal/mol | N/A | Bowen and Eaton, 1988 | gas phase; B |
By formula: N2+ + Ar = (N2+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 26.8 | kcal/mol | PD/KERD | Kim and Bowers, 1990 | gas phase; switching reaction(N2+)N2; Hiraoka and Nakajima, 1988; M |
ΔrH° | 25.4 | kcal/mol | PHPMS | Teng and Conway, 1973 | gas phase; switching reaction(N2+)N2; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.5 | cal/mol*K | PD/KERD | Kim and Bowers, 1990 | gas phase; switching reaction(N2+)N2; Hiraoka and Nakajima, 1988; M |
ΔrS° | 13.7 | cal/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 |
---|---|---|---|---|---|
ΔrH° | 3.8 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; ΔrH>; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17. | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; ΔrH>; M |
By formula: (N2+ • 2Ar) + Ar = (N2+ • 3Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.7 ± 0.2 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 13.7 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
By formula: (N2+ • 3Ar) + Ar = (N2+ • 4Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.7 ± 0.2 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.9 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
By formula: (N2+ • 4Ar) + Ar = (N2+ • 5Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.6 ± 0.2 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.0 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
By formula: (N2+ • 5Ar) + Ar = (N2+ • 6Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.6 ± 0.2 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.4 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
By formula: (N2+ • 6Ar) + Ar = (N2+ • 7Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.5 ± 0.2 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.3 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; M |
By formula: (N2+ • 7Ar) + Ar = (N2+ • 8Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.53 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17. | cal/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 |
---|---|---|---|---|---|
ΔrH° | 1.52 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1992 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17. | cal/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 |
---|---|---|---|---|---|
ΔrH° | 3.7 ± 2.1 | kcal/mol | CIDT | Armentrout and Rodgers, 2000 | RCD |
ΔrH° | 3.70 | kcal/mol | SCATTERING | Gislason, 1984 | gas phase; M |
ΔrH° | 4.39 | kcal/mol | IMob | Viehland, 1984 | gas phase; M |
ΔrH° | 4.4 | kcal/mol | DT | McKnight and Sawina, 1973 | gas phase; M |
ΔrH° | 4.87 | kcal/mol | IMob | Takebe, 1983 | gas phase; M |
By formula: O- + Ar = (O- • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.2 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 2.0 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 1.6 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 1.4 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 1.2 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 1.2 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 1.0 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.9 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.9 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.7 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.4 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.8 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.2 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.2 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.4 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.1 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.1 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.2 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.1 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.1 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.1 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.1 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.1 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.1 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.2 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 0.2 ± 2.0 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 1.66 | kcal/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 |
---|---|---|---|---|---|
ΔrH° | 2.03 | kcal/mol | IMob | Gatland, 1984, 2 | gas phase; M |
ΔrH° | 1.98 | kcal/mol | IMob | Viehland, 1984 | gas phase; M |
ΔrH° | 2.84 | kcal/mol | IMob | Takebe, 1983 | gas phase; M |
By formula: Xe+ + Ar = (Xe+ • Ar)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.1 | kcal/mol | PI | Dehmer and Pratt, 1982 | gas phase; M |
ΔrH° | 6.0 | kcal/mol | SIFT | Jones, Lister, et al., 1980 | gas phase; M |
ΔrH° | 3.2 | kcal/mol | PI | Ng, Tiedemann, et al., 1977 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.4 | cal/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.,
Study of the 2Ar + Ar2+ = Ar + Ar3+ Reaction,
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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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Hiraoka and Mori, 1989
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A Charge-Transfer Complex CH3+ Ar in the Gas Phase,
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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, 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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Gislason, E.A.,
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Interaction Potentials for Li+ - Rare - Gas Systems,
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Notes
Go To: Top, Ion clustering data, References
- Symbols used in this document:
T Temperature ΔrG° Free energy of reaction at standard conditions 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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