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
  • Ion clustering data
  • Vibrational and/or electronic energy levels
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
• Options:
  • Switch to SI units

Gas phase thermochemistry data

Go To: Top, Gas phase ion energetics data, Ion clustering data, Vibrational and/or electronic energy levels, References, Notes

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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Ion clustering data, Vibrational and/or electronic energy levels, References, Notes

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

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References, Notes

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

Data compiled by: 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

( • 2) +  = ( •  • 2)

By formula: (C⁺ • 2C) + C₃ = (C⁺ • C₃ • 2C)

( • 3) +  = ( •  • 3)

By formula: (C⁺ • 3C) + C₃ = (C⁺ • C₃ • 3C)

( • 4) +  = ( •  • 4)

By formula: (C⁺ • 4C) + C₃ = (C⁺ • C₃ • 4C)

( • 5) +  = ( •  • 5)

By formula: (C⁺ • 5C) + C₃ = (C⁺ • C₃ • 5C)

( • 6) +  = ( •  • 6)

By formula: (C⁺ • 6C) + C₃ = (C⁺ • C₃ • 6C)

( • 7) +  = ( •  • 7)

By formula: (C⁺ • 7C) + C₃ = (C⁺ • C₃ • 7C)

Vibrational and/or electronic energy levels

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, 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 by: Marilyn E. Jacox

State:   ¹S_u⁺

State:   D

State:   B

State:   ?

State:   A

State:   b

State:   a

State:   X

Additional references: Jacox, 1994, page 65; Jacox, 1998, page 168; Jacox, 2003, page 81; Becker, Tatarczyk, et al., 1979; Reisler, Mangir, et al., 1980; Jungen and Merer, 1980; Rohlfing and Goldsmith, 1990; Northrup and Sears, 1990; Northrup, Sears, et al., 1991

Notes

References

Go To: Top, Gas phase 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.

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Tokaryk, D.W.; Chomiak, D.E., Laser spectroscopy of C[sub 3]: Stimulated emission and absorption spectra of the A [sup 1]Π[sub u]--X [sup 1]Σ[sub g][sup +] transition, J. Chem. Phys., 1997, 106, 18, 7600, https://doi.org/10.1063/1.473762 . [all data]

Izuha and Yamanouchi, 1998
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Zhang, Chen, et al., 2005
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Northrup and Sears, 1990
Northrup, F.J.; Sears, T.J., Stimulated-emission pumping spectroscopy study of jet-cooled C_3: pure bending levels and bend---symmetric-stretch combination levels of X~^1Σ_g^+, J. Opt. Soc. Am. B, 1990, 7, 9, 1924, https://doi.org/10.1364/JOSAB.7.001924 . [all data]

Northrup, Sears, et al., 1991
Northrup, F.J.; Sears, T.J.; Rohlfing, E.A., A semirigid bender analysis of an extensive set of rotation-vibration levels in, J. Mol. Spectrosc., 1991, 145, 1, 74, https://doi.org/10.1016/0022-2852(91)90352-B . [all data]

Notes

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

• 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
  ΔrH°	Enthalpy of reaction at standard conditions

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