HCðC anion
- Formula: C2H-
- Molecular weight: 25.0299
- CAS Registry Number: 29075-95-4
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Ion clustering data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
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Clustering reactions
C2H- + = C3H2D5-
By formula: C2H- + CD4O = C3H2D5-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 21.4 ± 1.0 | kcal/mol | IMRE | Chabinyc and Brauman, 2000 | gas phase; Original dG=11.3 at 350K; dS based on symmetry alone; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 12.8 ± 1.0 | kcal/mol | IMRE | Chabinyc and Brauman, 2000 | gas phase; Original dG=11.3 at 350K; dS based on symmetry alone; B |
C2H- + = C3H2F3-
By formula: C2H- + CHF3 = C3H2F3-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 19.3 ± 1.0 | kcal/mol | IMRE | Chabinyc and Brauman, 2000 | gas phase; Original dG=9.2 at 350K; dS based on symmetry alone; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 10.7 ± 1.0 | kcal/mol | IMRE | Chabinyc and Brauman, 2000 | gas phase; Original dG=9.2 at 350K; dS based on symmetry alone; B |
C2H- + = C3H5O-
By formula: C2H- + CH4O = C3H5O-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 21.6 ± 2.0 | kcal/mol | IMRE | Chabinyc and Brauman, 1999 | gas phase; Anchored to MeOH ΔGacid=375.2; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 10.90 | kcal/mol | IMRE | Mustanir, Matsuoka, et al., 2006 | gas phase; B |
ΔrG° | 11.6 ± 2.0 | kcal/mol | IMRE | Chabinyc and Brauman, 1999 | gas phase; Anchored to MeOH ΔGacid=375.2; B |
By formula: (C2H- • 4294967295C2) + C2 = C2H-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 162.0 ± 3.8 | kcal/mol | N/A | Zhou, Garand, et al., 2007 | gas phase; B |
ΔrH° | 127.8 ± 3.9 | kcal/mol | Ther | Ruscic and Berkowitz, 1990 | gas phase; 376.7 0K; corrected with data from Gurvich, Veyts, et al.; B |
ΔrH° | 168.0 ± 2.7 | kcal/mol | Ther | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
By formula: C2H- + H2O = (C2H- • H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 16.2 ± 1.0 | kcal/mol | TDAs | Meot-ner, 1988 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 18.6 | cal/mol*K | PHPMS | Meot-ner, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 10.6 ± 1.0 | kcal/mol | TDAs | Meot-ner, 1988 | gas phase; B |
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.
Chabinyc and Brauman, 2000
Chabinyc, M.L.; Brauman, J.I.,
Unusual ionic hydrogen bonds: Complexes of acetylides and fluoroform,
J. Am. Chem. Soc., 2000, 122, 36, 8739-8745, https://doi.org/10.1021/ja000806z
. [all data]
Chabinyc and Brauman, 1999
Chabinyc, M.L.; Brauman, J.I.,
Hydrogen bond strength and acidity. Structural and energetic correlations for acetylides and alcohols,
J. Phys. Chem. A, 1999, 103, 46, 9163-9166, https://doi.org/10.1021/jp992852v
. [all data]
Mustanir, Matsuoka, et al., 2006
Mustanir; Matsuoka, M.; Mishima, M.; Koch, H.,
Stability of complexes of phenylacetylides and benzyl alkoxides with methanol in the gas phase. Acid-base correlation in the ionic hydrogen-bond strength,
Bull. Chem. Soc. Japan, 2006, 79, 7, 1118-1125, https://doi.org/10.1246/bcsj.79.1118
. [all data]
Zhou, Garand, et al., 2007
Zhou, J.; Garand, E.; Neumark, D.M.,
Vibronic structure in C2H and C2D from anion slow electron velocity-map imaging spectroscopy,
J. Chem. Phys., 2007, 127, 11, 114313, https://doi.org/10.1063/1.2768932
. [all data]
Ruscic and Berkowitz, 1990
Ruscic, B.; Berkowitz, J.,
Photoion-pair Formation and Photoelectron-induced Dissociative Attachment in C2H2: D0(HCC-H),
J. Chem. Phys., 1990, 93, 8, 5586, https://doi.org/10.1063/1.459629
. [all data]
Gurvich, Veyts, et al.
Gurvich, L.V.; Veyts, I.V.; Alcock, C.B.,
Hemisphere Publishing, NY, 1989, V. 1 2, Thermodynamic Properties of Individual Substances, 4th Ed. [all data]
Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr.,
The gas phase acidity scale from methanol to phenol,
J. Am. Chem. Soc., 1979, 101, 6047. [all data]
Meot-ner, 1988
Meot-ner, M.,
The Ionic Hydrogen Bond and Solvation. 7. Interaction Energies of Carbanions with Solvent Molecules,
J. Am. Chem. Soc., 1988, 110, 12, 3858, https://doi.org/10.1021/ja00220a022
. [all data]
Notes
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- Symbols used in this document:
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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