HCðC anion
- Formula: C2H-
- Molecular weight: 25.0299
- CAS Registry Number: 29075-95-4
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Reaction thermochemistry data
Go To: Top, Ion clustering data, 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:
B - John E. Bartmess
M - 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. 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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1580. ± 20. | kJ/mol | AVG | N/A | Average of 8 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1550. ± 20. | kJ/mol | AVG | N/A | Average of 7 values; Individual data points |
By formula: (C2H- • 4294967295C2) + C2 = C2H-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 678. ± 16. | kJ/mol | N/A | Zhou, Garand, et al., 2007 | gas phase; B |
ΔrH° | 535. ± 16. | kJ/mol | Ther | Ruscic and Berkowitz, 1990 | gas phase; 376.7 0K; corrected with data from Gurvich, Veyts, et al.; B |
ΔrH° | 703. ± 11. | kJ/mol | Ther | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
C2H- + = C3H5O-
By formula: C2H- + CH4O = C3H5O-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 90.4 ± 8.4 | kJ/mol | IMRE | Chabinyc and Brauman, 1999 | gas phase; Anchored to MeOH ΔGacid=375.2; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 45.61 | kJ/mol | IMRE | Mustanir, Matsuoka, et al., 2006 | gas phase; B |
ΔrG° | 48.5 ± 8.4 | kJ/mol | IMRE | Chabinyc and Brauman, 1999 | gas phase; Anchored to MeOH ΔGacid=375.2; B |
C2H- + = C3H2D5-
By formula: C2H- + CD4O = C3H2D5-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 89.5 ± 4.2 | kJ/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° | 53.6 ± 4.2 | kJ/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° | 80.8 ± 4.2 | kJ/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° | 44.8 ± 4.2 | kJ/mol | IMRE | Chabinyc and Brauman, 2000 | gas phase; Original dG=9.2 at 350K; dS based on symmetry alone; B |
By formula: C2H- + H2O = (C2H- • H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 67.8 ± 4.2 | kJ/mol | TDAs | Meot-ner, 1988 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 77.8 | J/mol*K | PHPMS | Meot-ner, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 44.4 ± 4.2 | kJ/mol | TDAs | Meot-ner, 1988 | gas phase; B |
Ion clustering data
Go To: Top, Reaction thermochemistry data, 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:
B - John E. Bartmess
M - 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
C2H- + = C3H2D5-
By formula: C2H- + CD4O = C3H2D5-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 89.5 ± 4.2 | kJ/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° | 53.6 ± 4.2 | kJ/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° | 80.8 ± 4.2 | kJ/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° | 44.8 ± 4.2 | kJ/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° | 90.4 ± 8.4 | kJ/mol | IMRE | Chabinyc and Brauman, 1999 | gas phase; Anchored to MeOH ΔGacid=375.2; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 45.61 | kJ/mol | IMRE | Mustanir, Matsuoka, et al., 2006 | gas phase; B |
ΔrG° | 48.5 ± 8.4 | kJ/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° | 678. ± 16. | kJ/mol | N/A | Zhou, Garand, et al., 2007 | gas phase; B |
ΔrH° | 535. ± 16. | kJ/mol | Ther | Ruscic and Berkowitz, 1990 | gas phase; 376.7 0K; corrected with data from Gurvich, Veyts, et al.; B |
ΔrH° | 703. ± 11. | kJ/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° | 67.8 ± 4.2 | kJ/mol | TDAs | Meot-ner, 1988 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 77.8 | J/mol*K | PHPMS | Meot-ner, 1988 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 44.4 ± 4.2 | kJ/mol | TDAs | Meot-ner, 1988 | gas phase; B |
References
Go To: Top, Reaction thermochemistry data, Ion clustering data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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]
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]
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]
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
Go To: Top, Reaction thermochemistry data, Ion clustering data, References
- 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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