Tricarbon

• Formula: C₃
• Molecular weight: 36.0321
• IUPAC Standard InChI: InChI=1S/C3/c1-3-2 Copy

  
• IUPAC Standard InChIKey: NVLRFXKSQQPKAD-UHFFFAOYSA-N Copy
• CAS Registry Number: 12075-35-3
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Carbon trimer
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
  • Ion clustering data
  • Vibrational and/or electronic energy levels
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
• Options:
  • Switch to calorie-based units

Gas phase 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.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to C₃⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

References

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Arnold, Bradforth, et al., 1991
Arnold, D.W.; Bradforth, S.E.; Kitsopoulos, T.N.; Neumark, D.M., Vibrationally Resolved Spectra of C2-C11 by Anion Photoelectron Spectroscopy, J. Chem. Phys., 1991, 95, 12, 8753, https://doi.org/10.1063/1.461211 . [all data]

Oakes and Ellison, 1986
Oakes, J.M.; Ellison, G.B., Photoelectron spectroscopy of radical anions, Tetrahedron, 1986, 42, 6263. [all data]

Sheehan, Parsons, et al., 2008
Sheehan, S.M.; Parsons, B.F.; Zhou, J.; Garand, E.; Yen, T.A.; Moore, D.T.; Neumark, D.M., Characterization of cyclic and linear C3H- and C3H via anion photoelectron spectroscopy, J. Chem. Phys., 2008, 128, 3, 034301, https://doi.org/10.1063/1.2812561 . [all data]

Yang, Taylor, et al., 1989
Yang, S.; Taylor, K.J.; Craycraft, M.J.; Conceicao, J.; Pettiette, C.L.; Cherhnovsky, O.; Smalley, R.E., UPS of 2-30 Atom Carbon Clusters: Chains and Rings, Chem. Phys. Lett., 1989, 144, 5-6, 431, https://doi.org/10.1016/0009-2614(88)87291-9 . [all data]

Honig, 1954
Honig, R.E., Mass spectrometric study of the molecular sublimation of graphite, J. Chem. Phys., 1954, 22, 126. [all data]

Ramathan, Zimmerman, et al., 1993
Ramathan, R.; Zimmerman, J.A.; Eyler, J.R., Ionization potentials of small carbon clusters, J. Chem. Phys., 1993, 98, 7838. [all data]

Gupta and Gingerich, 1979
Gupta, S.K.; Gingerich, K.A., Observation and atomization energies of the gaseous uranium carbides, UC, UC₂, UC₃, UC₄, UC₅, and UC₆ by high temperature mass spectrometry, J. Chem. Phys., 1979, 71, 3072. [all data]

Wyatt and Stafford, 1972
Wyatt, J.R.; Stafford, F.E., Mass spectrometric determination of the heat of formation of ethynyl radical, C₂H, and of some related species, J. Phys. Chem., 1972, 76, 1913. [all data]

Kohl and Stearns, 1970
Kohl, F.J.; Stearns, C.A., Vaporization thermodynamics of yttrium dicarbide-carbon system and dissociation energy of yttrium dicarbide and tetracarbide, J. Chem. Phys., 1970, 52, 6310. [all data]

Drowart, Burns, et al., 1959
Drowart, J.; Burns, R.P.; DeMaria, G.; Inghram, M.G., Mass spectrometric study of carbon vapor, J. Chem. Phys., 1959, 31, 1131. [all data]

Notes

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• Symbols used in this document:
  

  EA	Electron affinity
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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