Benzene

• Formula: C₆H₆
• Molecular weight: 78.1118
• IUPAC Standard InChI: InChI=1S/C6H6/c1-2-4-6-5-3-1/h1-6H Copy

  
• IUPAC Standard InChIKey: UHOVQNZJYSORNB-UHFFFAOYSA-N Copy
• CAS Registry Number: 71-43-2
• 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.
• Isotopologues:
  • Benzene-D6
• Other names: [6]Annulene; Benzol; Benzole; Coal naphtha; Cyclohexatriene; Phenyl hydride; Pyrobenzol; Pyrobenzole; Benzolene; Bicarburet of hydrogen; Carbon oil; Mineral naphtha; Motor benzol; Benzeen; Benzen; Benzin; Benzine; Benzolo; Fenzen; NCI-C55276; Phene; Rcra waste number U019; UN 1114; NSC 67315; 1,3,5-Cyclohexatriene
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Reaction thermochemistry data (reactions 1 to 50)
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data: reactions 51 to 99
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Vibrational and/or electronic energy levels
  • Gas Chromatography
  • Fluid Properties
• Data at other public NIST sites:
  • Electron-Impact Ionization Cross Sections (on physics web site)
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
  • NIST Polycyclic Aromatic Hydrocarbon Structure Index
• Options:
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Reaction thermochemistry data

Go To: Top, 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
RCD - Robert C. Dunbar

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.

Reactions 1 to 50

 +  = ( • )

By formula: Cl^- + C₆H₆ = (Cl^- • C₆H₆)

Free energy of reaction

C₆H₅^- +  =

By formula: C₆H₅^- + H⁺ = C₆H₆

C₆H₆⁺ +  = (C₆H₆⁺ • )

By formula: C₆H₆⁺ + C₆H₆ = (C₆H₆⁺ • C₆H₆)

Bond type: Charge transfer bond (positive ion)

 +  = ( • )

By formula: Li⁺ + C₆H₆ = (Li⁺ • C₆H₆)

 +  = ( • )

By formula: Br^- + C₆H₆ = (Br^- • C₆H₆)

Free energy of reaction

( • ) +  = ( • 2)

By formula: (Na⁺ • C₆H₆) + C₆H₆ = (Na⁺ • 2C₆H₆)

 +  = ( • )

By formula: Na⁺ + C₆H₆ = (Na⁺ • C₆H₆)

Free energy of reaction

C₉H₁₃N⁺ +  = (C₉H₁₃N⁺ • )

By formula: C₉H₁₃N⁺ + C₆H₆ = (C₉H₁₃N⁺ • C₆H₆)

Bond type: Charge transfer bond (positive ion)

Free energy of reaction

C₇H₉N⁺ +  = (C₇H₉N⁺ • )

By formula: C₇H₉N⁺ + C₆H₆ = (C₇H₉N⁺ • C₆H₆)

Bond type: Charge transfer bond (positive ion)

C₈H₁₁N⁺ +  = (C₈H₁₁N⁺ • )

By formula: C₈H₁₁N⁺ + C₆H₆ = (C₈H₁₁N⁺ • C₆H₆)

Bond type: Charge transfer bond (positive ion)

C₁₀H₁₀Fe⁺ +  = (C₁₀H₁₀Fe⁺ • )

By formula: C₁₀H₁₀Fe⁺ + C₆H₆ = (C₁₀H₁₀Fe⁺ • C₆H₆)

Free energy of reaction

( • ) +  = ( • 2)

By formula: (Co⁺ • C₆H₆) + C₆H₆ = (Co⁺ • 2C₆H₆)

Enthalpy of reaction

C₇H₈⁺ +  = (C₇H₈⁺ • )

By formula: C₇H₈⁺ + C₆H₆ = (C₇H₈⁺ • C₆H₆)

Bond type: Charge transfer bond (positive ion)

C₂H₇O⁺ +  = (C₂H₇O⁺ • )

By formula: C₂H₇O⁺ + C₆H₆ = (C₂H₇O⁺ • C₆H₆)

Free energy of reaction

( •  • ) +  = ( • 2 • )

By formula: (K⁺ • C₆H₆ • H₂O) + C₆H₆ = (K⁺ • 2C₆H₆ • H₂O)

( • 2 • ) +  = ( • 3 • )

By formula: (K⁺ • 2H₂O • C₆H₆) + H₂O = (K⁺ • 3H₂O • C₆H₆)

( •  • ) +  = ( • 2 • )

By formula: (K⁺ • H₂O • C₆H₆) + H₂O = (K⁺ • 2H₂O • C₆H₆)

 +  = ( • )

By formula: I^- + C₆H₆ = (I^- • C₆H₆)

C₃H₃⁺ +  = (C₃H₃⁺ • )

By formula: C₃H₃⁺ + C₆H₆ = (C₃H₃⁺ • C₆H₆)

( •  • 2) +  = ( • 2 • 2)

By formula: (K⁺ • H₂O • 2C₆H₆) + H₂O = (K⁺ • 2H₂O • 2C₆H₆)

(C₆H₆⁺ • 2) +  = (C₆H₆⁺ • 3)

By formula: (C₆H₆⁺ • 2C₆H₆) + C₆H₆ = (C₆H₆⁺ • 3C₆H₆)

Bond type: Charge transfer bond (positive ion)

( •  • 2) +  = ( • 2 • 2)

By formula: (K⁺ • C₆H₆ • 2H₂O) + C₆H₆ = (K⁺ • 2C₆H₆ • 2H₂O)

 +  = ( • )

By formula: Cr⁺ + C₆H₆ = (Cr⁺ • C₆H₆)

Enthalpy of reaction

( • 2) +  = ( •  • 2)

By formula: (K⁺ • 2C₆H₆) + H₂O = (K⁺ • H₂O • 2C₆H₆)

( • ) +  = ( •  • )

By formula: (K⁺ • C₆H₆) + H₂O = (K⁺ • H₂O • C₆H₆)

( • 2) +  = ( •  • 2)

By formula: (K⁺ • 2H₂O) + C₆H₆ = (K⁺ • C₆H₆ • 2H₂O)

( • 3) +  = ( •  • 3)

By formula: (K⁺ • 3H₂O) + C₆H₆ = (K⁺ • C₆H₆ • 3H₂O)

( • ) +  = ( •  • )

By formula: (K⁺ • H₂O) + C₆H₆ = (K⁺ • C₆H₆ • H₂O)

( • ) +  = ( • 2)

By formula: (Cr⁺ • C₆H₆) + C₆H₆ = (Cr⁺ • 2C₆H₆)

Enthalpy of reaction

 +  = ( • )

By formula: F^- + C₆H₆ = (F^- • C₆H₆)

 +  = ( • )

By formula: Mn⁺ + C₆H₆ = (Mn⁺ • C₆H₆)

Enthalpy of reaction

 +  = ( • )

By formula: V⁺ + C₆H₆ = (V⁺ • C₆H₆)

Enthalpy of reaction

 +  = ( • )

By formula: Fe⁺ + C₆H₆ = (Fe⁺ • C₆H₆)

Enthalpy of reaction

 +  = ( • )

By formula: Ti⁺ + C₆H₆ = (Ti⁺ • C₆H₆)

Enthalpy of reaction

( • ) +  = ( • 2)

By formula: (K⁺ • C₆H₆) + C₆H₆ = (K⁺ • 2C₆H₆)

C₄H₉⁺ +  = (C₄H₉⁺ • )

By formula: C₄H₉⁺ + C₆H₆ = (C₄H₉⁺ • C₆H₆)

(C₆H₆⁺ • ) +  = (C₆H₆⁺ • 2)

By formula: (C₆H₆⁺ • C₆H₆) + C₆H₆ = (C₆H₆⁺ • 2C₆H₆)

Bond type: Charge transfer bond (positive ion)

 +  = ( • )

By formula: K⁺ + C₆H₆ = (K⁺ • C₆H₆)

C₆H₇N⁺ +  = (C₆H₇N⁺ • )

By formula: C₆H₇N⁺ + C₆H₆ = (C₆H₇N⁺ • C₆H₆)

Bond type: Charge transfer bond (positive ion)

C₁₁H₁₀⁺ +  = (C₁₁H₁₀⁺ • )

By formula: C₁₁H₁₀⁺ + C₆H₆ = (C₁₁H₁₀⁺ • C₆H₆)

Bond type: Charge transfer bond (positive ion)

C₆H₅Cl⁺ +  = (C₆H₅Cl⁺ • )

By formula: C₆H₅Cl⁺ + C₆H₆ = (C₆H₅Cl⁺ • C₆H₆)

Bond type: Charge transfer bond (positive ion)

C₉H₁₂⁺ +  = (C₉H₁₂⁺ • )

By formula: C₉H₁₂⁺ + C₆H₆ = (C₉H₁₂⁺ • C₆H₆)

Bond type: Charge transfer bond (positive ion)

 +  = ( • )

By formula: NO^- + C₆H₆ = (NO^- • C₆H₆)

( • ) +  = ( • 2)

By formula: (Fe⁺ • C₆H₆) + C₆H₆ = (Fe⁺ • 2C₆H₆)

Enthalpy of reaction

( • ) +  = ( • 2)

By formula: (Ti⁺ • C₆H₆) + C₆H₆ = (Ti⁺ • 2C₆H₆)

Enthalpy of reaction

( • ) +  = ( • 2)

By formula: (Mn⁺ • C₆H₆) + C₆H₆ = (Mn⁺ • 2C₆H₆)

Enthalpy of reaction

( • ) +  = ( • 2)

By formula: (Ni⁺ • C₆H₆) + C₆H₆ = (Ni⁺ • 2C₆H₆)

Enthalpy of reaction

( • ) +  = ( • 2)

By formula: (Cu⁺ • C₆H₆) + C₆H₆ = (Cu⁺ • 2C₆H₆)

Enthalpy of reaction

(CAS Reg. No. 79431-04-2 • 4294967295) +  = CAS Reg. No. 79431-04-2

By formula: (CAS Reg. No. 79431-04-2 • 4294967295C₆H₆) + C₆H₆ = CAS Reg. No. 79431-04-2

 +  = ( • )

By formula: Ni⁺ + C₆H₆ = (Ni⁺ • C₆H₆)

Enthalpy of reaction

References

Go To: Top, Reaction thermochemistry data, Notes

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

Tschurl, Ueberfluss, et al., 2007
Tschurl, M.; Ueberfluss, C.; Boesl, U., Anion photoelectron, photodetachment, and infrared dissociation spectra of Cl-center dot C6H6, Chem. Phys. Lett., 2007, 439, 1-3, 23-28, https://doi.org/10.1016/j.cplett.2007.03.059 . [all data]

Hiraoka, Mizuse, et al., 1988
Hiraoka, K.; Mizuse, S.; Yamabe, S., Determination of the Stabilities and Structures of X-(C6H6) Clusters (X = Cl, Br, and I), Chem. Phys. Lett., 1988, 147, 2-3, 174, https://doi.org/10.1016/0009-2614(88)85078-4 . [all data]

Larson and McMahon, 1984
Larson, J.W.; McMahon, T.B., Hydrogen bonding in gas phase anions. An experimental investigation of the interaction between chloride ion and bronsted acids from ICR chloride exchange equilibria, J. Am. Chem. Soc., 1984, 106, 517. [all data]

Paul and Kebarle, 1991
Paul, G.J.C.; Kebarle, P., Stabilities of Complexes of Br- with Substituted Benzenes (SB) Based on Determinations of the Gas-Phase Equilibria Br- + SB = (BrSB)-, J. Am. Chem. Soc., 1991, 113, 4, 1148, https://doi.org/10.1021/ja00004a014 . [all data]

Sunner, Nishizawa, et al., 1981
Sunner, J.; Nishizawa, K.; Kebarle, P., Ion - Solvent Molecule Interactions in the Gas Phase. Potassium Ion and Benzene, J. Phys. Chem., 1981, 85, 13, 1814, https://doi.org/10.1021/j150613a011 . [all data]

Larson and McMahon, 1984, 2
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French, Ikuta, et al., 1982
French, M.A.; Ikuta, S.; Kebarle, P., Hydrogen bonding of O-H and C-H hydrogen donors to Cl^-. Results from mass spectrometric measurement of the ion-molecule equilibria RH + Cl^- = RHCl^-, Can. J. Chem., 1982, 60, 1907. [all data]

Chowdhury and Kebarle, 1986
Chowdhury, S.; Kebarle, P., Role of Binding Energies in A^-.B and A.B^- Complexes in the Kinetics of Gas Phase Electron Transfer Reactions:A^- + B = A + B^- Involving Perfluoro Compounds: SF₆, C₆F₁₁CF₃, J. Chem. Phys., 1986, 85, 9, 4989, https://doi.org/10.1063/1.451687 . [all data]

Davico, Bierbaum, et al., 1995
Davico, G.E.; Bierbaum, V.M.; Depuy, C.H.; Ellison, G.B.; Squires, R.R., The C-H bond energy of benzene, J. Am. Chem. Soc., 1995, 117, 9, 2590, https://doi.org/10.1021/ja00114a023 . [all data]

Ervin and DeTuro, 2002
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Alecu, Gao, et al., 2007
Alecu, I.M.; Gao, Y.D.; Hsieh, P.C.; Sand, J.P.; Ors, A.; McLeod, A.; Marshall, P., Studies of the kinetics and thermochemistry of the forward and reverse reaction Cl+C6H6=HCl+C6H5, J. Phys. Chem. A, 2007, 111, 19, 3970-3976, https://doi.org/10.1021/jp067212o . [all data]

Gunion, Gilles, et al., 1992
Gunion, R.F.; Gilles, M.K.; Polak, M.L.; Lineberger, W.C., Ultraviolet Photoelectron Spectroscopy of the Phenide, Benzyl, and Phenoxide Anions., Int. J. Mass Spectrom. Ion Proc., 1992, 117, 601, https://doi.org/10.1016/0168-1176(92)80115-H . [all data]

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Meot-ner, M.; Sieck, L.W., Relative acidities of water and methanol, and the stabilities of the dimer adducts, J. Phys. Chem., 1986, 90, 6687. [all data]

Graul and Squires, 1990
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Bohme and Young, 1971
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Bartmess and McIver Jr., 1979
Bartmess, J.E.; McIver Jr., The Gas Phase Acidity Scale in Gas Phase Ion Chemistry, Gas Phase Ion Chemistry, V. 2, M.T. Bowers, Ed., Academic Press, NY, 1979, Ch. 11, Elsevier, 1979. [all data]

Hiraoka, Fujimaki, et al., 1991
Hiraoka, K.; Fujimaki, S.; Aruga, K.; Yamabe, S., Stability and Structure of Benzene Dimer Cation (C6H6)2+, J. Chem. Phys., 1991, 95, 11, 8413, https://doi.org/10.1063/1.461270 . [all data]

Meot-Ner (Mautner), Hamlet, et al., 1978
Meot-Ner (Mautner), M.; Hamlet, P.; Hunter, E.P.; Field, F.H., Bonding Energies in Association Ions of Aromatic Molecules. Correlations with Ionization Energies, J. Am. Chem. Soc., 1978, 100, 17, 5466, https://doi.org/10.1021/ja00485a034 . [all data]

Field, Hamlet, et al., 1969
Field, F.H.; Hamlet, P.; Libby, W.F., Effect of Temperature on the Mass Spectrum of Benzene at High Pressures, J. Am. Chem. Soc., 1969, 91, 11, 2839, https://doi.org/10.1021/ja01039a003 . [all data]

Amicangelo and Armentrout, 2000
Amicangelo, J.C.; Armentrout, P.B., Absolute Binding Energies of Alkali-Metal Cation Complexes with Benzene Determined by Threshold Collision-Induced Dissociation Experiments and Ab Initio Theory, J. Phys. Chem. A, 2000, 104, 48, 11420, https://doi.org/10.1021/jp002652f . [all data]

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Woodin, R.L.; Beauchamp, J.L., Bonding of Li+ to Lewis Bases in the Gas Phase. Reversals in Methyl Substituent Effects for Different Reference Acids, J. Am. Chem. Soc., 1978, 100, 2, 501, https://doi.org/10.1021/ja00470a024 . [all data]

Dzidic and Kebarle, 1970
Dzidic, I.; Kebarle, P., Hydration of the Alkali Ions in the Gas Phase. Enthalpies and Entropies of Reactions M+(H2O)n-1 + H2O = M+(H2O)n, J. Phys. Chem., 1970, 74, 7, 1466, https://doi.org/10.1021/j100702a013 . [all data]

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Staley, R.H.; Beauchamp, J.L., Intrinsic Acid - Base Properties of Molecules. Binding Energies of Li+ to pi - and n - Donor Bases, J. Am. Chem. Soc., 1975, 97, 20, 5920, https://doi.org/10.1021/ja00853a050 . [all data]

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Meot-Ner (Mautner), 1989
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Meyer, Khan, et al., 1995
Meyer, F.; Khan, F.A.; Armentrout, P.B., Thermochemistry of Transition Metal Benzene complexes: Binding energies of M(C6H6)x+ (x = 1,2) for M = Ti to Cu, J. Am. Chem. Soc., 1995, 117, 38, 9740, https://doi.org/10.1021/ja00143a018 . [all data]

Kemper, Bushnell, et al., 1993
Kemper, P.R.; Bushnell, J.; Von Koppen, P.; Bowers, M.T., Binding Energies of Co+(H2/CH4/C2H6)1,2,3 Clusters, J. Phys. Chem., 1993, 97, 9, 1810, https://doi.org/10.1021/j100111a016 . [all data]

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Searles and Kebarle, 1969
Searles, S.K.; Kebarle, P., Hydration of the Potassium Ion in the Gas Phase: Enthalpies and Entropies of Hydration Reactions K+(H2O)n-1 + H2O = K+(H2O)n for n=1 to n=6, Can. J. Chem., 1969, 47, 14, 2619, https://doi.org/10.1139/v69-432 . [all data]

Caldwell, Masucci, et al., 1989
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Lin and Dunbar, 1997
Lin, C.-Y.; Dunbar, R.C., Radiative Association Kinetics and Binding Energies of Chromium Ions with Benzene and Benzene Derivatives, Organometallics, 1997, 16, 12, 2691, https://doi.org/10.1021/om960949n . [all data]

Hiraoka, Mizuse, et al., 1987
Hiraoka, K.; Mizuse, S.; Yamabe, S., A Determination of the Stability and Structure of F^-(C₆H₆) and F^-(C₆F₆) Clusters, J. Chem. Phys., 1987, 86, 7, 4102, https://doi.org/10.1063/1.451920 . [all data]

Gapeev and Dunbar, 2002
Gapeev, A.; Dunbar, R.C., Reactivity and Binding Energies of Transition Metal Halide Ions with Benzene, J. Am. Soc. Mass Spectrom., 2002, 13, 5, 477, https://doi.org/10.1016/S1044-0305(02)00373-2 . [all data]

Sen Sharma, Ikuta, et al., 1982
Sen Sharma, D.K.; Ikuta, S.; Kebarle, P., Alkylation of Benzene by Alkyl Cations. Stability of the tert - Butyl Benzenium Ion, Can. J. Chem., 1982, 60, 18, 2325, https://doi.org/10.1139/v82-331 . [all data]

El-Shall and Meot-Ner (Mautner), 1987
El-Shall, M.S.; Meot-Ner (Mautner), M., Ionic Charge Transfer Complexes. 3. Delocalised pi Systems as Electron Acceptors and Donors, J. Phys. Chem., 1987, 91, 5, 1088, https://doi.org/10.1021/j100289a017 . [all data]

Reents and Freiser, 1981
Reents, W.D.; Freiser, B.S., Gas-Phase Binding Energies and Spectroscopic Properties of NO+ Charge-Transfer Complexes, J. Am. Chem. Soc., 1981, 103, 2791. [all data]

Farid and McMahon, 1978
Farid, R.; McMahon, T.B., Gas-Phase Ion-Molecule Reactions of Alkyl Nitrites by Ion Cyclotron Resonance Spectroscopy, Int. J. Mass Spectrom. Ion Phys., 1978, 27, 2, 163, https://doi.org/10.1016/0020-7381(78)80037-0 . [all data]

Lee and Squires, 1986
Lee, R.E.; Squires, R.R., Anionic homoaromaticity: A gas phase experimental study, J. Am. Chem. Soc., 1986, 105, 5078. [all data]

Notes

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• Symbols used in this document:
  

  T	Temperature
  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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