HCðC anion

• Formula: C₂H^-
• Molecular weight: 25.0299
• CAS Registry Number: 29075-95-4
• Information on this page:
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
  • Vibrational and/or electronic energy levels
  • References
  • Notes
• Options:
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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:
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

C₂H^- +  =

By formula: C₂H^- + H⁺ = C₂H₂

(C₂H^- • 4294967295) +  = C₂H^-

By formula: (C₂H^- • 4294967295C₂) + C₂ = C₂H^-

C₂H^- +  = C₃H₅O^-

By formula: C₂H^- + CH₄O = C₃H₅O^-

C₂H^- +  = C₃H₂D₅^-

By formula: C₂H^- + CD₄O = C₃H₂D₅^-

C₂H^- +  = C₃H₂F₃^-

By formula: C₂H^- + CHF₃ = C₃H₂F₃^-

C₂H^- +  = (C₂H^- • )

By formula: C₂H^- + H₂O = (C₂H^- • H₂O)

Gas phase ion energetics 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 by: John E. Bartmess

Protonation reactions

C₂H^- +  =

By formula: C₂H^- + H⁺ = C₂H₂

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

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^-

C₂H^- +  = C₃H₂F₃^-

By formula: C₂H^- + CHF₃ = C₃H₂F₃^-

C₂H^- +  = C₃H₅O^-

By formula: C₂H^- + CH₄O = C₃H₅O^-

(C₂H^- • 4294967295) +  = C₂H^-

By formula: (C₂H^- • 4294967295C₂) + C₂ = C₂H^-

C₂H^- +  = (C₂H^- • )

By formula: C₂H^- + H₂O = (C₂H^- • H₂O)

Vibrational and/or electronic energy levels

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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 by: Marilyn E. Jacox

State:   ?

State:   X

Additional references: Jacox, 1994, page 37; Jacox, 2003, page 32; Brunken, Gottlieb, et al., 2007

Notes

References

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, Vibrational and/or electronic energy levels, 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]

Ervin and Lineberger, 1991
Ervin, K.M.; Lineberger, W.C., Photoelectron Spectra of C2- and C2H-, J. Phys. Chem., 1991, 95, 3, 1167, https://doi.org/10.1021/j100156a026 . [all data]

Taylor, Xu, et al., 1998
Taylor, T.R.; Xu, C.; Neumark, D.M., Photoelectron spectra of the C[sub 2n]H[sup -] (n=1--4) and C[sub 2n]D[sup -] (n=1--3) anions, J. Chem. Phys., 1998, 108, 24, 10018, https://doi.org/10.1063/1.476462 . [all data]

Andrews, Kushto, et al., 1999
Andrews, L.; Kushto, G.P.; Zhou, M.; Willson, S.P.; Souter, P.F., Infrared spectrum of CCH[sup +] in solid argon and neon, J. Chem. Phys., 1999, 110, 9, 4457, https://doi.org/10.1063/1.478329 . [all data]

Forney, Jacox, et al., 1992
Forney, D.; Jacox, M.E.; Thompson, W.E., The vibrational spectra of molecular ions isolated in solid neon: HCCH+ and HCC-, J. Mol. Spectrosc., 1992, 153, 1-2, 680, https://doi.org/10.1016/0022-2852(92)90502-F . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Jacox, 2003
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement B, J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629 . [all data]

Brunken, Gottlieb, et al., 2007
Brunken, S.; Gottlieb, C.A.; Gupta, H.; McCarthy, M.C.; Thaddeus, P., Laboratory detection of the negative molecular ion CCH, Astron. Astrophys., 2007, 464, 3, L33, https://doi.org/10.1051/0004-6361:20066964 . [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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