p-Benzoquinone, 2,3,5,6-tetrachloro-

• Formula: C₆Cl₄O₂
• Molecular weight: 245.875
• IUPAC Standard InChI: InChI=1S/C6Cl4O2/c7-1-2(8)6(12)4(10)3(9)5(1)11 Copy

  
• IUPAC Standard InChIKey: UGNWTBMOAKPKBL-UHFFFAOYSA-N Copy
• CAS Registry Number: 118-75-2
• 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.
• Other names: p-Chloranil; 2,5-Cyclohexadiene-1,4-dione, 2,3,5,6-tetrachloro-; α-Chloranil; Chloranil; Coversan; Dow Seed Disinfectant No. 5; ENT 3,797; Khloranil; Psorisan; Quinone Tetrachloride; Reranil; Spergon; Spergon I; Spergon Technical; Tetrachloro-p-benzoquinone; Tetrachloro-p-quinone; Tetrachloro-1,4-benzoquinone; Tetrachlorobenzoquinone; Tetrachloroquinone; Vulklor; 2,3,5,6-Tetrachloro-p-benzoquinone; 2,3,5,6-Tetrachloro-1,4-benzoquinone; 2,3,5,6-Tetrachlorobenzoquinone; 2,3,5,6-Tetrachloroquinone; 2,3,5,6-Tetrachloro-2,5-cyclohexadiene-1,4-dione; G-444E; G-25804; Geigy-444e; Tetrachloroparabenzoquinone; 1,4-Benzoquinone, 2,3,5,6-tetrachloro-; Tetrachlorquinone; ENT 3797; NSC 8432
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• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • References
  • Notes
• Data at other public NIST sites:
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Condensed 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.

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of solid

Phase change 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Enthalpy of sublimation

Enthalpy of fusion

Enthalpy of phase transition

Entropy of phase transition

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 as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
B - John E. Bartmess

Electron affinity determinations

Ionization energy determinations

IR Spectrum

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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: Coblentz Society, Inc.

Condensed Phase Spectrum

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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

UV/Visible spectrum

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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: Victor Talrose, Alexander N. Yermakov, Alexy A. Usov, Antonina A. Goncharova, Axlexander N. Leskin, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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Additional Data

References

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

Sjostrom, 1936
Sjostrom, Av.G., De klorsubstituerade kinonernas och hydrokinonernas termokemi, Svensk. Kim. Tidr., 1936, 48, 121-124. [all data]

Smith, Bjellerup, et al., 1953
Smith, L.; Bjellerup, L.; Krook, S.; Westermark, H., Heats of combustion of organic chloro compounds determined by the "quartz wool" method, Acta Chem. Scand., 1953, 7, 65. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Swietoslawski and Starczedska, 1925
Swietoslawski, W.; Starczedska, H., Correction des donnees thermochimiques de M.A. Valeur, J. Chem. Phys., 1925, 22, 399-401. [all data]

Chihara and Masukane, 1973
Chihara, H.; Masukane, K., Heat capacity of solid tetrachloro-p-benzoquinone(chloranil) between 11 and 300K. Phase transitions at 92K, J. Chem. Phys., 1973, 59, 5397-5403. [all data]

Donnelly, Drewes, et al., 1990
Donnelly, J.R.; Drewes, L.A.; Johnson, R.L.; Munslow, W.D.; Knapp, K.K.; Sovocool, G.W., Purity and heat of fusion data for environmental standards as determined by differential scanning calorimetry, Thermochim. Acta, 1990, 167, 2, 155, https://doi.org/10.1016/0040-6031(90)80476-F . [all data]

Coolidge and Coolidge, 1927
Coolidge, A.S.; Coolidge, M.S., The sublimation pressures of substituted quinones and hydroquinones, J. Am. Chem. Soc., 1927, 49, 100-104. [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Jones, 1960
Jones, A.H., Sublimation Pressure Data for Organic Compounds., J. Chem. Eng. Data, 1960, 5, 2, 196-200, https://doi.org/10.1021/je60006a019 . [all data]

Cox and Pilcher, 1970, 2
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press Inc., London, 1970, 643. [all data]

Acree, 1991
Acree, William E., Thermodynamic properties of organic compounds: enthalpy of fusion and melting point temperature compilation, Thermochimica Acta, 1991, 189, 1, 37-56, https://doi.org/10.1016/0040-6031(91)87098-H . [all data]

Heinis, Chowdhury, et al., 1988
Heinis, T.; Chowdhury, S.; Scott, S.L.; Kebarle, P., Electron Affinities of Benzo-, Naphtho-, and Anthraquinones Determined from Gas-Phase Equilibria Measurements, J. Am. Chem. Soc., 1988, 110, 2, 400, https://doi.org/10.1021/ja00210a015 . [all data]

Brinkman, Gunther, et al., 1994
Brinkman, E.A.; Gunther, E.; Schafer, O.; Brauman, J.I., Bound Excited Electronic States of Anions, J. Chem. Phys., 1994, 100, 3, 1840, https://doi.org/10.1063/1.466535 . [all data]

Fukuda and McIver, 1985
Fukuda, E.K.; McIver, R.T., Jr., Relative electron affinities of substituted benzophenones, nitrobenzenes, and quinones. [Anchored to EA(SO₂) from 74CEL/BEN], J. Am. Chem. Soc., 1985, 107, 2291. [all data]

Cooper, Frey, et al., 1978
Cooper, C.D.; Frey, W.F.; Compton, R.N., Negative ion properties of fluoranil, chloranil, and bromanil: Electron affinities, J. Chem. Phys., 1978, 69, 2367. [all data]

Farragher and Page, 1966
Farragher, A.L.; Page, F.M., Experimental Determination of Electron Affinities. Part 9. - Benzoquinone, Chloranil and Related Compounds, Trans. Farad. Soc., 1966, 62, 3072, https://doi.org/10.1039/tf9666203072 . [all data]

Sato, Seki, et al., 1981
Sato, N.; Seki, K.; Inokuchi, H., Polarization energies of organic solids determined by ultraviolet photoelectron spectroscopy, J. Chem. Soc. Faraday Trans. 2, 1981, 77, 1621. [all data]

Dougherty and McGlynn, 1977
Dougherty, D.; McGlynn, S.P., Photoelectron spectroscopy of carbonyls. 1,4-Benzoquinones, J. Am. Chem. Soc., 1977, 99, 3234. [all data]

Perkampus and Braunschweig, 1966
Perkampus, H.-H.; Braunschweig, T.H., UV atlas of organic compouds, 1966, 1, B8/5. [all data]

Notes

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• Symbols used in this document:
  

  Cp,solid	Constant pressure heat capacity of solid
  EA	Electron affinity
  S°solid,1 bar	Entropy of solid at standard conditions (1 bar)
  Tfus	Fusion (melting) point
  ΔHtrs	Enthalpy of phase transition
  ΔStrs	Entropy of phase transition
  ΔcH°solid	Enthalpy of combustion of solid at standard conditions
  ΔfH°solid	Enthalpy of formation of solid at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔsubH	Enthalpy of sublimation
  ΔsubH°	Enthalpy of sublimation at standard conditions
  ΔvapH	Enthalpy of vaporization

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